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Linux 4.19.133
[linux/fpc-iii.git] / drivers / crypto / chelsio / chtls / chtls_cm.c
blob28d24118c6450d933e2e73877f34e0853da21b3e
1 /*
2 * Copyright (c) 2018 Chelsio Communications, Inc.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 *
8 * Written by: Atul Gupta (atul.gupta@chelsio.com)
9 */
10
11 #include <linux/module.h>
12 #include <linux/list.h>
13 #include <linux/workqueue.h>
14 #include <linux/skbuff.h>
15 #include <linux/timer.h>
16 #include <linux/notifier.h>
17 #include <linux/inetdevice.h>
18 #include <linux/ip.h>
19 #include <linux/tcp.h>
20 #include <linux/sched/signal.h>
21 #include <linux/kallsyms.h>
22 #include <linux/kprobes.h>
23 #include <linux/if_vlan.h>
24 #include <net/tcp.h>
25 #include <net/dst.h>
26
27 #include "chtls.h"
28 #include "chtls_cm.h"
29
30 /*
31 * State transitions and actions for close. Note that if we are in SYN_SENT
32 * we remain in that state as we cannot control a connection while it's in
33 * SYN_SENT; such connections are allowed to establish and are then aborted.
34 */
35 static unsigned char new_state[16] = {
36 /* current state: new state: action: */
37 /* (Invalid) */ TCP_CLOSE,
38 /* TCP_ESTABLISHED */ TCP_FIN_WAIT1 | TCP_ACTION_FIN,
39 /* TCP_SYN_SENT */ TCP_SYN_SENT,
40 /* TCP_SYN_RECV */ TCP_FIN_WAIT1 | TCP_ACTION_FIN,
41 /* TCP_FIN_WAIT1 */ TCP_FIN_WAIT1,
42 /* TCP_FIN_WAIT2 */ TCP_FIN_WAIT2,
43 /* TCP_TIME_WAIT */ TCP_CLOSE,
44 /* TCP_CLOSE */ TCP_CLOSE,
45 /* TCP_CLOSE_WAIT */ TCP_LAST_ACK | TCP_ACTION_FIN,
46 /* TCP_LAST_ACK */ TCP_LAST_ACK,
47 /* TCP_LISTEN */ TCP_CLOSE,
48 /* TCP_CLOSING */ TCP_CLOSING,
49 };
50
51 static struct chtls_sock *chtls_sock_create(struct chtls_dev *cdev)
52 {
53 struct chtls_sock *csk = kzalloc(sizeof(*csk), GFP_ATOMIC);
54
55 if (!csk)
56 return NULL;
57
58 csk->txdata_skb_cache = alloc_skb(TXDATA_SKB_LEN, GFP_ATOMIC);
59 if (!csk->txdata_skb_cache) {
60 kfree(csk);
61 return NULL;
62 }
63
64 kref_init(&csk->kref);
65 csk->cdev = cdev;
66 skb_queue_head_init(&csk->txq);
67 csk->wr_skb_head = NULL;
68 csk->wr_skb_tail = NULL;
69 csk->mss = MAX_MSS;
70 csk->tlshws.ofld = 1;
71 csk->tlshws.txkey = -1;
72 csk->tlshws.rxkey = -1;
73 csk->tlshws.mfs = TLS_MFS;
74 skb_queue_head_init(&csk->tlshws.sk_recv_queue);
75 return csk;
76 }
77
78 static void chtls_sock_release(struct kref *ref)
79 {
80 struct chtls_sock *csk =
81 container_of(ref, struct chtls_sock, kref);
82
83 kfree(csk);
84 }
85
86 static struct net_device *chtls_ipv4_netdev(struct chtls_dev *cdev,
87 struct sock *sk)
88 {
89 struct net_device *ndev = cdev->ports[0];
90
91 if (likely(!inet_sk(sk)->inet_rcv_saddr))
92 return ndev;
93
94 ndev = ip_dev_find(&init_net, inet_sk(sk)->inet_rcv_saddr);
95 if (!ndev)
96 return NULL;
97
98 if (is_vlan_dev(ndev))
99 return vlan_dev_real_dev(ndev);
100 return ndev;
101 }
102
103 static void assign_rxopt(struct sock *sk, unsigned int opt)
104 {
105 const struct chtls_dev *cdev;
106 struct chtls_sock *csk;
107 struct tcp_sock *tp;
108
109 csk = rcu_dereference_sk_user_data(sk);
110 tp = tcp_sk(sk);
111
112 cdev = csk->cdev;
113 tp->tcp_header_len = sizeof(struct tcphdr);
114 tp->rx_opt.mss_clamp = cdev->mtus[TCPOPT_MSS_G(opt)] - 40;
115 tp->mss_cache = tp->rx_opt.mss_clamp;
116 tp->rx_opt.tstamp_ok = TCPOPT_TSTAMP_G(opt);
117 tp->rx_opt.snd_wscale = TCPOPT_SACK_G(opt);
118 tp->rx_opt.wscale_ok = TCPOPT_WSCALE_OK_G(opt);
119 SND_WSCALE(tp) = TCPOPT_SND_WSCALE_G(opt);
120 if (!tp->rx_opt.wscale_ok)
121 tp->rx_opt.rcv_wscale = 0;
122 if (tp->rx_opt.tstamp_ok) {
123 tp->tcp_header_len += TCPOLEN_TSTAMP_ALIGNED;
124 tp->rx_opt.mss_clamp -= TCPOLEN_TSTAMP_ALIGNED;
125 } else if (csk->opt2 & TSTAMPS_EN_F) {
126 csk->opt2 &= ~TSTAMPS_EN_F;
127 csk->mtu_idx = TCPOPT_MSS_G(opt);
128 }
129 }
130
131 static void chtls_purge_receive_queue(struct sock *sk)
132 {
133 struct sk_buff *skb;
134
135 while ((skb = __skb_dequeue(&sk->sk_receive_queue)) != NULL) {
136 skb_dst_set(skb, (void *)NULL);
137 kfree_skb(skb);
138 }
139 }
140
141 static void chtls_purge_write_queue(struct sock *sk)
142 {
143 struct chtls_sock *csk = rcu_dereference_sk_user_data(sk);
144 struct sk_buff *skb;
145
146 while ((skb = __skb_dequeue(&csk->txq))) {
147 sk->sk_wmem_queued -= skb->truesize;
148 __kfree_skb(skb);
149 }
150 }
151
152 static void chtls_purge_recv_queue(struct sock *sk)
153 {
154 struct chtls_sock *csk = rcu_dereference_sk_user_data(sk);
155 struct chtls_hws *tlsk = &csk->tlshws;
156 struct sk_buff *skb;
157
158 while ((skb = __skb_dequeue(&tlsk->sk_recv_queue)) != NULL) {
159 skb_dst_set(skb, NULL);
160 kfree_skb(skb);
161 }
162 }
163
164 static void abort_arp_failure(void *handle, struct sk_buff *skb)
165 {
166 struct cpl_abort_req *req = cplhdr(skb);
167 struct chtls_dev *cdev;
168
169 cdev = (struct chtls_dev *)handle;
170 req->cmd = CPL_ABORT_NO_RST;
171 cxgb4_ofld_send(cdev->lldi->ports[0], skb);
172 }
173
174 static struct sk_buff *alloc_ctrl_skb(struct sk_buff *skb, int len)
175 {
176 if (likely(skb && !skb_shared(skb) && !skb_cloned(skb))) {
177 __skb_trim(skb, 0);
178 refcount_add(2, &skb->users);
179 } else {
180 skb = alloc_skb(len, GFP_KERNEL | __GFP_NOFAIL);
181 }
182 return skb;
183 }
184
185 static void chtls_send_abort(struct sock *sk, int mode, struct sk_buff *skb)
186 {
187 struct cpl_abort_req *req;
188 struct chtls_sock *csk;
189 struct tcp_sock *tp;
190
191 csk = rcu_dereference_sk_user_data(sk);
192 tp = tcp_sk(sk);
193
194 if (!skb)
195 skb = alloc_ctrl_skb(csk->txdata_skb_cache, sizeof(*req));
196
197 req = (struct cpl_abort_req *)skb_put(skb, sizeof(*req));
198 INIT_TP_WR_CPL(req, CPL_ABORT_REQ, csk->tid);
199 skb_set_queue_mapping(skb, (csk->txq_idx << 1) | CPL_PRIORITY_DATA);
200 req->rsvd0 = htonl(tp->snd_nxt);
201 req->rsvd1 = !csk_flag_nochk(csk, CSK_TX_DATA_SENT);
202 req->cmd = mode;
203 t4_set_arp_err_handler(skb, csk->cdev, abort_arp_failure);
204 send_or_defer(sk, tp, skb, mode == CPL_ABORT_SEND_RST);
205 }
206
207 static void chtls_send_reset(struct sock *sk, int mode, struct sk_buff *skb)
208 {
209 struct chtls_sock *csk = rcu_dereference_sk_user_data(sk);
210
211 if (unlikely(csk_flag_nochk(csk, CSK_ABORT_SHUTDOWN) ||
212 !csk->cdev)) {
213 if (sk->sk_state == TCP_SYN_RECV)
214 csk_set_flag(csk, CSK_RST_ABORTED);
215 goto out;
216 }
217
218 if (!csk_flag_nochk(csk, CSK_TX_DATA_SENT)) {
219 struct tcp_sock *tp = tcp_sk(sk);
220
221 if (send_tx_flowc_wr(sk, 0, tp->snd_nxt, tp->rcv_nxt) < 0)
222 WARN_ONCE(1, "send tx flowc error");
223 csk_set_flag(csk, CSK_TX_DATA_SENT);
224 }
225
226 csk_set_flag(csk, CSK_ABORT_RPL_PENDING);
227 chtls_purge_write_queue(sk);
228
229 csk_set_flag(csk, CSK_ABORT_SHUTDOWN);
230 if (sk->sk_state != TCP_SYN_RECV)
231 chtls_send_abort(sk, mode, skb);
232 else
233 goto out;
234
235 return;
236 out:
237 if (skb)
238 kfree_skb(skb);
239 }
240
241 static void release_tcp_port(struct sock *sk)
242 {
243 if (inet_csk(sk)->icsk_bind_hash)
244 inet_put_port(sk);
245 }
246
247 static void tcp_uncork(struct sock *sk)
248 {
249 struct tcp_sock *tp = tcp_sk(sk);
250
251 if (tp->nonagle & TCP_NAGLE_CORK) {
252 tp->nonagle &= ~TCP_NAGLE_CORK;
253 chtls_tcp_push(sk, 0);
254 }
255 }
256
257 static void chtls_close_conn(struct sock *sk)
258 {
259 struct cpl_close_con_req *req;
260 struct chtls_sock *csk;
261 struct sk_buff *skb;
262 unsigned int tid;
263 unsigned int len;
264
265 len = roundup(sizeof(struct cpl_close_con_req), 16);
266 csk = rcu_dereference_sk_user_data(sk);
267 tid = csk->tid;
268
269 skb = alloc_skb(len, GFP_KERNEL | __GFP_NOFAIL);
270 req = (struct cpl_close_con_req *)__skb_put(skb, len);
271 memset(req, 0, len);
272 req->wr.wr_hi = htonl(FW_WR_OP_V(FW_TP_WR) |
273 FW_WR_IMMDLEN_V(sizeof(*req) -
274 sizeof(req->wr)));
275 req->wr.wr_mid = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*req), 16)) |
276 FW_WR_FLOWID_V(tid));
277
278 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid));
279
280 tcp_uncork(sk);
281 skb_entail(sk, skb, ULPCB_FLAG_NO_HDR | ULPCB_FLAG_NO_APPEND);
282 if (sk->sk_state != TCP_SYN_SENT)
283 chtls_push_frames(csk, 1);
284 }
285
286 /*
287 * Perform a state transition during close and return the actions indicated
288 * for the transition. Do not make this function inline, the main reason
289 * it exists at all is to avoid multiple inlining of tcp_set_state.
290 */
291 static int make_close_transition(struct sock *sk)
292 {
293 int next = (int)new_state[sk->sk_state];
294
295 tcp_set_state(sk, next & TCP_STATE_MASK);
296 return next & TCP_ACTION_FIN;
297 }
298
299 void chtls_close(struct sock *sk, long timeout)
300 {
301 int data_lost, prev_state;
302 struct chtls_sock *csk;
303
304 csk = rcu_dereference_sk_user_data(sk);
305
306 lock_sock(sk);
307 sk->sk_shutdown |= SHUTDOWN_MASK;
308
309 data_lost = skb_queue_len(&sk->sk_receive_queue);
310 data_lost |= skb_queue_len(&csk->tlshws.sk_recv_queue);
311 chtls_purge_recv_queue(sk);
312 chtls_purge_receive_queue(sk);
313
314 if (sk->sk_state == TCP_CLOSE) {
315 goto wait;
316 } else if (data_lost || sk->sk_state == TCP_SYN_SENT) {
317 chtls_send_reset(sk, CPL_ABORT_SEND_RST, NULL);
318 release_tcp_port(sk);
319 goto unlock;
320 } else if (sock_flag(sk, SOCK_LINGER) && !sk->sk_lingertime) {
321 sk->sk_prot->disconnect(sk, 0);
322 } else if (make_close_transition(sk)) {
323 chtls_close_conn(sk);
324 }
325 wait:
326 if (timeout)
327 sk_stream_wait_close(sk, timeout);
328
329 unlock:
330 prev_state = sk->sk_state;
331 sock_hold(sk);
332 sock_orphan(sk);
333
334 release_sock(sk);
335
336 local_bh_disable();
337 bh_lock_sock(sk);
338
339 if (prev_state != TCP_CLOSE && sk->sk_state == TCP_CLOSE)
340 goto out;
341
342 if (sk->sk_state == TCP_FIN_WAIT2 && tcp_sk(sk)->linger2 < 0 &&
343 !csk_flag(sk, CSK_ABORT_SHUTDOWN)) {
344 struct sk_buff *skb;
345
346 skb = alloc_skb(sizeof(struct cpl_abort_req), GFP_ATOMIC);
347 if (skb)
348 chtls_send_reset(sk, CPL_ABORT_SEND_RST, skb);
349 }
350
351 if (sk->sk_state == TCP_CLOSE)
352 inet_csk_destroy_sock(sk);
353
354 out:
355 bh_unlock_sock(sk);
356 local_bh_enable();
357 sock_put(sk);
358 }
359
360 /*
361 * Wait until a socket enters on of the given states.
362 */
363 static int wait_for_states(struct sock *sk, unsigned int states)
364 {
365 DECLARE_WAITQUEUE(wait, current);
366 struct socket_wq _sk_wq;
367 long current_timeo;
368 int err = 0;
369
370 current_timeo = 200;
371
372 /*
373 * We want this to work even when there's no associated struct socket.
374 * In that case we provide a temporary wait_queue_head_t.
375 */
376 if (!sk->sk_wq) {
377 init_waitqueue_head(&_sk_wq.wait);
378 _sk_wq.fasync_list = NULL;
379 init_rcu_head_on_stack(&_sk_wq.rcu);
380 RCU_INIT_POINTER(sk->sk_wq, &_sk_wq);
381 }
382
383 add_wait_queue(sk_sleep(sk), &wait);
384 while (!sk_in_state(sk, states)) {
385 if (!current_timeo) {
386 err = -EBUSY;
387 break;
388 }
389 if (signal_pending(current)) {
390 err = sock_intr_errno(current_timeo);
391 break;
392 }
393 set_current_state(TASK_UNINTERRUPTIBLE);
394 release_sock(sk);
395 if (!sk_in_state(sk, states))
396 current_timeo = schedule_timeout(current_timeo);
397 __set_current_state(TASK_RUNNING);
398 lock_sock(sk);
399 }
400 remove_wait_queue(sk_sleep(sk), &wait);
401
402 if (rcu_dereference(sk->sk_wq) == &_sk_wq)
403 sk->sk_wq = NULL;
404 return err;
405 }
406
407 int chtls_disconnect(struct sock *sk, int flags)
408 {
409 struct chtls_sock *csk;
410 struct tcp_sock *tp;
411 int err;
412
413 tp = tcp_sk(sk);
414 csk = rcu_dereference_sk_user_data(sk);
415 chtls_purge_recv_queue(sk);
416 chtls_purge_receive_queue(sk);
417 chtls_purge_write_queue(sk);
418
419 if (sk->sk_state != TCP_CLOSE) {
420 sk->sk_err = ECONNRESET;
421 chtls_send_reset(sk, CPL_ABORT_SEND_RST, NULL);
422 err = wait_for_states(sk, TCPF_CLOSE);
423 if (err)
424 return err;
425 }
426 chtls_purge_recv_queue(sk);
427 chtls_purge_receive_queue(sk);
428 tp->max_window = 0xFFFF << (tp->rx_opt.snd_wscale);
429 return tcp_disconnect(sk, flags);
430 }
431
432 #define SHUTDOWN_ELIGIBLE_STATE (TCPF_ESTABLISHED | \
433 TCPF_SYN_RECV | TCPF_CLOSE_WAIT)
434 void chtls_shutdown(struct sock *sk, int how)
435 {
436 if ((how & SEND_SHUTDOWN) &&
437 sk_in_state(sk, SHUTDOWN_ELIGIBLE_STATE) &&
438 make_close_transition(sk))
439 chtls_close_conn(sk);
440 }
441
442 void chtls_destroy_sock(struct sock *sk)
443 {
444 struct chtls_sock *csk;
445
446 csk = rcu_dereference_sk_user_data(sk);
447 chtls_purge_recv_queue(sk);
448 csk->ulp_mode = ULP_MODE_NONE;
449 chtls_purge_write_queue(sk);
450 free_tls_keyid(sk);
451 kref_put(&csk->kref, chtls_sock_release);
452 sk->sk_prot = &tcp_prot;
453 sk->sk_prot->destroy(sk);
454 }
455
456 static void reset_listen_child(struct sock *child)
457 {
458 struct chtls_sock *csk = rcu_dereference_sk_user_data(child);
459 struct sk_buff *skb;
460
461 skb = alloc_ctrl_skb(csk->txdata_skb_cache,
462 sizeof(struct cpl_abort_req));
463
464 chtls_send_reset(child, CPL_ABORT_SEND_RST, skb);
465 sock_orphan(child);
466 INC_ORPHAN_COUNT(child);
467 if (child->sk_state == TCP_CLOSE)
468 inet_csk_destroy_sock(child);
469 }
470
471 static void chtls_disconnect_acceptq(struct sock *listen_sk)
472 {
473 struct request_sock **pprev;
474
475 pprev = ACCEPT_QUEUE(listen_sk);
476 while (*pprev) {
477 struct request_sock *req = *pprev;
478
479 if (req->rsk_ops == &chtls_rsk_ops) {
480 struct sock *child = req->sk;
481
482 *pprev = req->dl_next;
483 sk_acceptq_removed(listen_sk);
484 reqsk_put(req);
485 sock_hold(child);
486 local_bh_disable();
487 bh_lock_sock(child);
488 release_tcp_port(child);
489 reset_listen_child(child);
490 bh_unlock_sock(child);
491 local_bh_enable();
492 sock_put(child);
493 } else {
494 pprev = &req->dl_next;
495 }
496 }
497 }
498
499 static int listen_hashfn(const struct sock *sk)
500 {
501 return ((unsigned long)sk >> 10) & (LISTEN_INFO_HASH_SIZE - 1);
502 }
503
504 static struct listen_info *listen_hash_add(struct chtls_dev *cdev,
505 struct sock *sk,
506 unsigned int stid)
507 {
508 struct listen_info *p = kmalloc(sizeof(*p), GFP_KERNEL);
509
510 if (p) {
511 int key = listen_hashfn(sk);
512
513 p->sk = sk;
514 p->stid = stid;
515 spin_lock(&cdev->listen_lock);
516 p->next = cdev->listen_hash_tab[key];
517 cdev->listen_hash_tab[key] = p;
518 spin_unlock(&cdev->listen_lock);
519 }
520 return p;
521 }
522
523 static int listen_hash_find(struct chtls_dev *cdev,
524 struct sock *sk)
525 {
526 struct listen_info *p;
527 int stid = -1;
528 int key;
529
530 key = listen_hashfn(sk);
531
532 spin_lock(&cdev->listen_lock);
533 for (p = cdev->listen_hash_tab[key]; p; p = p->next)
534 if (p->sk == sk) {
535 stid = p->stid;
536 break;
537 }
538 spin_unlock(&cdev->listen_lock);
539 return stid;
540 }
541
542 static int listen_hash_del(struct chtls_dev *cdev,
543 struct sock *sk)
544 {
545 struct listen_info *p, **prev;
546 int stid = -1;
547 int key;
548
549 key = listen_hashfn(sk);
550 prev = &cdev->listen_hash_tab[key];
551
552 spin_lock(&cdev->listen_lock);
553 for (p = *prev; p; prev = &p->next, p = p->next)
554 if (p->sk == sk) {
555 stid = p->stid;
556 *prev = p->next;
557 kfree(p);
558 break;
559 }
560 spin_unlock(&cdev->listen_lock);
561 return stid;
562 }
563
564 static void cleanup_syn_rcv_conn(struct sock *child, struct sock *parent)
565 {
566 struct request_sock *req;
567 struct chtls_sock *csk;
568
569 csk = rcu_dereference_sk_user_data(child);
570 req = csk->passive_reap_next;
571
572 reqsk_queue_removed(&inet_csk(parent)->icsk_accept_queue, req);
573 __skb_unlink((struct sk_buff *)&csk->synq, &csk->listen_ctx->synq);
574 chtls_reqsk_free(req);
575 csk->passive_reap_next = NULL;
576 }
577
578 static void chtls_reset_synq(struct listen_ctx *listen_ctx)
579 {
580 struct sock *listen_sk = listen_ctx->lsk;
581
582 while (!skb_queue_empty(&listen_ctx->synq)) {
583 struct chtls_sock *csk =
584 container_of((struct synq *)__skb_dequeue
585 (&listen_ctx->synq), struct chtls_sock, synq);
586 struct sock *child = csk->sk;
587
588 cleanup_syn_rcv_conn(child, listen_sk);
589 sock_hold(child);
590 local_bh_disable();
591 bh_lock_sock(child);
592 release_tcp_port(child);
593 reset_listen_child(child);
594 bh_unlock_sock(child);
595 local_bh_enable();
596 sock_put(child);
597 }
598 }
599
600 int chtls_listen_start(struct chtls_dev *cdev, struct sock *sk)
601 {
602 struct net_device *ndev;
603 struct listen_ctx *ctx;
604 struct adapter *adap;
605 struct port_info *pi;
606 int stid;
607 int ret;
608
609 if (sk->sk_family != PF_INET)
610 return -EAGAIN;
611
612 rcu_read_lock();
613 ndev = chtls_ipv4_netdev(cdev, sk);
614 rcu_read_unlock();
615 if (!ndev)
616 return -EBADF;
617
618 pi = netdev_priv(ndev);
619 adap = pi->adapter;
620 if (!(adap->flags & FULL_INIT_DONE))
621 return -EBADF;
622
623 if (listen_hash_find(cdev, sk) >= 0) /* already have it */
624 return -EADDRINUSE;
625
626 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
627 if (!ctx)
628 return -ENOMEM;
629
630 __module_get(THIS_MODULE);
631 ctx->lsk = sk;
632 ctx->cdev = cdev;
633 ctx->state = T4_LISTEN_START_PENDING;
634 skb_queue_head_init(&ctx->synq);
635
636 stid = cxgb4_alloc_stid(cdev->tids, sk->sk_family, ctx);
637 if (stid < 0)
638 goto free_ctx;
639
640 sock_hold(sk);
641 if (!listen_hash_add(cdev, sk, stid))
642 goto free_stid;
643
644 ret = cxgb4_create_server(ndev, stid,
645 inet_sk(sk)->inet_rcv_saddr,
646 inet_sk(sk)->inet_sport, 0,
647 cdev->lldi->rxq_ids[0]);
648 if (ret > 0)
649 ret = net_xmit_errno(ret);
650 if (ret)
651 goto del_hash;
652 return 0;
653 del_hash:
654 listen_hash_del(cdev, sk);
655 free_stid:
656 cxgb4_free_stid(cdev->tids, stid, sk->sk_family);
657 sock_put(sk);
658 free_ctx:
659 kfree(ctx);
660 module_put(THIS_MODULE);
661 return -EBADF;
662 }
663
664 void chtls_listen_stop(struct chtls_dev *cdev, struct sock *sk)
665 {
666 struct listen_ctx *listen_ctx;
667 int stid;
668
669 stid = listen_hash_del(cdev, sk);
670 if (stid < 0)
671 return;
672
673 listen_ctx = (struct listen_ctx *)lookup_stid(cdev->tids, stid);
674 chtls_reset_synq(listen_ctx);
675
676 cxgb4_remove_server(cdev->lldi->ports[0], stid,
677 cdev->lldi->rxq_ids[0], 0);
678 chtls_disconnect_acceptq(sk);
679 }
680
681 static int chtls_pass_open_rpl(struct chtls_dev *cdev, struct sk_buff *skb)
682 {
683 struct cpl_pass_open_rpl *rpl = cplhdr(skb) + RSS_HDR;
684 unsigned int stid = GET_TID(rpl);
685 struct listen_ctx *listen_ctx;
686
687 listen_ctx = (struct listen_ctx *)lookup_stid(cdev->tids, stid);
688 if (!listen_ctx)
689 return CPL_RET_BUF_DONE;
690
691 if (listen_ctx->state == T4_LISTEN_START_PENDING) {
692 listen_ctx->state = T4_LISTEN_STARTED;
693 return CPL_RET_BUF_DONE;
694 }
695
696 if (rpl->status != CPL_ERR_NONE) {
697 pr_info("Unexpected PASS_OPEN_RPL status %u for STID %u\n",
698 rpl->status, stid);
699 return CPL_RET_BUF_DONE;
700 }
701 cxgb4_free_stid(cdev->tids, stid, listen_ctx->lsk->sk_family);
702 sock_put(listen_ctx->lsk);
703 kfree(listen_ctx);
704 module_put(THIS_MODULE);
705
706 return 0;
707 }
708
709 static int chtls_close_listsrv_rpl(struct chtls_dev *cdev, struct sk_buff *skb)
710 {
711 struct cpl_close_listsvr_rpl *rpl = cplhdr(skb) + RSS_HDR;
712 struct listen_ctx *listen_ctx;
713 unsigned int stid;
714 void *data;
715
716 stid = GET_TID(rpl);
717 data = lookup_stid(cdev->tids, stid);
718 listen_ctx = (struct listen_ctx *)data;
719
720 if (rpl->status != CPL_ERR_NONE) {
721 pr_info("Unexpected CLOSE_LISTSRV_RPL status %u for STID %u\n",
722 rpl->status, stid);
723 return CPL_RET_BUF_DONE;
724 }
725
726 cxgb4_free_stid(cdev->tids, stid, listen_ctx->lsk->sk_family);
727 sock_put(listen_ctx->lsk);
728 kfree(listen_ctx);
729 module_put(THIS_MODULE);
730
731 return 0;
732 }
733
734 static void chtls_purge_wr_queue(struct sock *sk)
735 {
736 struct sk_buff *skb;
737
738 while ((skb = dequeue_wr(sk)) != NULL)
739 kfree_skb(skb);
740 }
741
742 static void chtls_release_resources(struct sock *sk)
743 {
744 struct chtls_sock *csk = rcu_dereference_sk_user_data(sk);
745 struct chtls_dev *cdev = csk->cdev;
746 unsigned int tid = csk->tid;
747 struct tid_info *tids;
748
749 if (!cdev)
750 return;
751
752 tids = cdev->tids;
753 kfree_skb(csk->txdata_skb_cache);
754 csk->txdata_skb_cache = NULL;
755
756 if (csk->wr_credits != csk->wr_max_credits) {
757 chtls_purge_wr_queue(sk);
758 chtls_reset_wr_list(csk);
759 }
760
761 if (csk->l2t_entry) {
762 cxgb4_l2t_release(csk->l2t_entry);
763 csk->l2t_entry = NULL;
764 }
765
766 cxgb4_remove_tid(tids, csk->port_id, tid, sk->sk_family);
767 sock_put(sk);
768 }
769
770 static void chtls_conn_done(struct sock *sk)
771 {
772 if (sock_flag(sk, SOCK_DEAD))
773 chtls_purge_receive_queue(sk);
774 sk_wakeup_sleepers(sk, 0);
775 tcp_done(sk);
776 }
777
778 static void do_abort_syn_rcv(struct sock *child, struct sock *parent)
779 {
780 /*
781 * If the server is still open we clean up the child connection,
782 * otherwise the server already did the clean up as it was purging
783 * its SYN queue and the skb was just sitting in its backlog.
784 */
785 if (likely(parent->sk_state == TCP_LISTEN)) {
786 cleanup_syn_rcv_conn(child, parent);
787 /* Without the below call to sock_orphan,
788 * we leak the socket resource with syn_flood test
789 * as inet_csk_destroy_sock will not be called
790 * in tcp_done since SOCK_DEAD flag is not set.
791 * Kernel handles this differently where new socket is
792 * created only after 3 way handshake is done.
793 */
794 sock_orphan(child);
795 percpu_counter_inc((child)->sk_prot->orphan_count);
796 chtls_release_resources(child);
797 chtls_conn_done(child);
798 } else {
799 if (csk_flag(child, CSK_RST_ABORTED)) {
800 chtls_release_resources(child);
801 chtls_conn_done(child);
802 }
803 }
804 }
805
806 static void pass_open_abort(struct sock *child, struct sock *parent,
807 struct sk_buff *skb)
808 {
809 do_abort_syn_rcv(child, parent);
810 kfree_skb(skb);
811 }
812
813 static void bl_pass_open_abort(struct sock *lsk, struct sk_buff *skb)
814 {
815 pass_open_abort(skb->sk, lsk, skb);
816 }
817
818 static void chtls_pass_open_arp_failure(struct sock *sk,
819 struct sk_buff *skb)
820 {
821 const struct request_sock *oreq;
822 struct chtls_sock *csk;
823 struct chtls_dev *cdev;
824 struct sock *parent;
825 void *data;
826
827 csk = rcu_dereference_sk_user_data(sk);
828 cdev = csk->cdev;
829
830 /*
831 * If the connection is being aborted due to the parent listening
832 * socket going away there's nothing to do, the ABORT_REQ will close
833 * the connection.
834 */
835 if (csk_flag(sk, CSK_ABORT_RPL_PENDING)) {
836 kfree_skb(skb);
837 return;
838 }
839
840 oreq = csk->passive_reap_next;
841 data = lookup_stid(cdev->tids, oreq->ts_recent);
842 parent = ((struct listen_ctx *)data)->lsk;
843
844 bh_lock_sock(parent);
845 if (!sock_owned_by_user(parent)) {
846 pass_open_abort(sk, parent, skb);
847 } else {
848 BLOG_SKB_CB(skb)->backlog_rcv = bl_pass_open_abort;
849 __sk_add_backlog(parent, skb);
850 }
851 bh_unlock_sock(parent);
852 }
853
854 static void chtls_accept_rpl_arp_failure(void *handle,
855 struct sk_buff *skb)
856 {
857 struct sock *sk = (struct sock *)handle;
858
859 sock_hold(sk);
860 process_cpl_msg(chtls_pass_open_arp_failure, sk, skb);
861 sock_put(sk);
862 }
863
864 static unsigned int chtls_select_mss(const struct chtls_sock *csk,
865 unsigned int pmtu,
866 struct cpl_pass_accept_req *req)
867 {
868 struct chtls_dev *cdev;
869 struct dst_entry *dst;
870 unsigned int tcpoptsz;
871 unsigned int iphdrsz;
872 unsigned int mtu_idx;
873 struct tcp_sock *tp;
874 unsigned int mss;
875 struct sock *sk;
876
877 mss = ntohs(req->tcpopt.mss);
878 sk = csk->sk;
879 dst = __sk_dst_get(sk);
880 cdev = csk->cdev;
881 tp = tcp_sk(sk);
882 tcpoptsz = 0;
883
884 iphdrsz = sizeof(struct iphdr) + sizeof(struct tcphdr);
885 if (req->tcpopt.tstamp)
886 tcpoptsz += round_up(TCPOLEN_TIMESTAMP, 4);
887
888 tp->advmss = dst_metric_advmss(dst);
889 if (USER_MSS(tp) && tp->advmss > USER_MSS(tp))
890 tp->advmss = USER_MSS(tp);
891 if (tp->advmss > pmtu - iphdrsz)
892 tp->advmss = pmtu - iphdrsz;
893 if (mss && tp->advmss > mss)
894 tp->advmss = mss;
895
896 tp->advmss = cxgb4_best_aligned_mtu(cdev->lldi->mtus,
897 iphdrsz + tcpoptsz,
898 tp->advmss - tcpoptsz,
899 8, &mtu_idx);
900 tp->advmss -= iphdrsz;
901
902 inet_csk(sk)->icsk_pmtu_cookie = pmtu;
903 return mtu_idx;
904 }
905
906 static unsigned int select_rcv_wnd(struct chtls_sock *csk)
907 {
908 unsigned int rcvwnd;
909 unsigned int wnd;
910 struct sock *sk;
911
912 sk = csk->sk;
913 wnd = tcp_full_space(sk);
914
915 if (wnd < MIN_RCV_WND)
916 wnd = MIN_RCV_WND;
917
918 rcvwnd = MAX_RCV_WND;
919
920 csk_set_flag(csk, CSK_UPDATE_RCV_WND);
921 return min(wnd, rcvwnd);
922 }
923
924 static unsigned int select_rcv_wscale(int space, int wscale_ok, int win_clamp)
925 {
926 int wscale = 0;
927
928 if (space > MAX_RCV_WND)
929 space = MAX_RCV_WND;
930 if (win_clamp && win_clamp < space)
931 space = win_clamp;
932
933 if (wscale_ok) {
934 while (wscale < 14 && (65535 << wscale) < space)
935 wscale++;
936 }
937 return wscale;
938 }
939
940 static void chtls_pass_accept_rpl(struct sk_buff *skb,
941 struct cpl_pass_accept_req *req,
942 unsigned int tid)
943
944 {
945 struct cpl_t5_pass_accept_rpl *rpl5;
946 struct cxgb4_lld_info *lldi;
947 const struct tcphdr *tcph;
948 const struct tcp_sock *tp;
949 struct chtls_sock *csk;
950 unsigned int len;
951 struct sock *sk;
952 u32 opt2, hlen;
953 u64 opt0;
954
955 sk = skb->sk;
956 tp = tcp_sk(sk);
957 csk = sk->sk_user_data;
958 csk->tid = tid;
959 lldi = csk->cdev->lldi;
960 len = roundup(sizeof(*rpl5), 16);
961
962 rpl5 = __skb_put_zero(skb, len);
963 INIT_TP_WR(rpl5, tid);
964
965 OPCODE_TID(rpl5) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
966 csk->tid));
967 csk->mtu_idx = chtls_select_mss(csk, dst_mtu(__sk_dst_get(sk)),
968 req);
969 opt0 = TCAM_BYPASS_F |
970 WND_SCALE_V((tp)->rx_opt.rcv_wscale) |
971 MSS_IDX_V(csk->mtu_idx) |
972 L2T_IDX_V(csk->l2t_entry->idx) |
973 NAGLE_V(!(tp->nonagle & TCP_NAGLE_OFF)) |
974 TX_CHAN_V(csk->tx_chan) |
975 SMAC_SEL_V(csk->smac_idx) |
976 DSCP_V(csk->tos >> 2) |
977 ULP_MODE_V(ULP_MODE_TLS) |
978 RCV_BUFSIZ_V(min(tp->rcv_wnd >> 10, RCV_BUFSIZ_M));
979
980 opt2 = RX_CHANNEL_V(0) |
981 RSS_QUEUE_VALID_F | RSS_QUEUE_V(csk->rss_qid);
982
983 if (!is_t5(lldi->adapter_type))
984 opt2 |= RX_FC_DISABLE_F;
985 if (req->tcpopt.tstamp)
986 opt2 |= TSTAMPS_EN_F;
987 if (req->tcpopt.sack)
988 opt2 |= SACK_EN_F;
989 hlen = ntohl(req->hdr_len);
990
991 tcph = (struct tcphdr *)((u8 *)(req + 1) +
992 T6_ETH_HDR_LEN_G(hlen) + T6_IP_HDR_LEN_G(hlen));
993 if (tcph->ece && tcph->cwr)
994 opt2 |= CCTRL_ECN_V(1);
995 opt2 |= CONG_CNTRL_V(CONG_ALG_NEWRENO);
996 opt2 |= T5_ISS_F;
997 opt2 |= T5_OPT_2_VALID_F;
998 rpl5->opt0 = cpu_to_be64(opt0);
999 rpl5->opt2 = cpu_to_be32(opt2);
1000 rpl5->iss = cpu_to_be32((prandom_u32() & ~7UL) - 1);
1001 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
1002 t4_set_arp_err_handler(skb, sk, chtls_accept_rpl_arp_failure);
1003 cxgb4_l2t_send(csk->egress_dev, skb, csk->l2t_entry);
1004 }
1005
1006 static void inet_inherit_port(struct inet_hashinfo *hash_info,
1007 struct sock *lsk, struct sock *newsk)
1008 {
1009 local_bh_disable();
1010 __inet_inherit_port(lsk, newsk);
1011 local_bh_enable();
1012 }
1013
1014 static int chtls_backlog_rcv(struct sock *sk, struct sk_buff *skb)
1015 {
1016 if (skb->protocol) {
1017 kfree_skb(skb);
1018 return 0;
1019 }
1020 BLOG_SKB_CB(skb)->backlog_rcv(sk, skb);
1021 return 0;
1022 }
1023
1024 static struct sock *chtls_recv_sock(struct sock *lsk,
1025 struct request_sock *oreq,
1026 void *network_hdr,
1027 const struct cpl_pass_accept_req *req,
1028 struct chtls_dev *cdev)
1029 {
1030 const struct tcphdr *tcph;
1031 struct inet_sock *newinet;
1032 const struct iphdr *iph;
1033 struct net_device *ndev;
1034 struct chtls_sock *csk;
1035 struct dst_entry *dst;
1036 struct neighbour *n;
1037 struct tcp_sock *tp;
1038 struct sock *newsk;
1039 u16 port_id;
1040 int rxq_idx;
1041 int step;
1042
1043 iph = (const struct iphdr *)network_hdr;
1044 newsk = tcp_create_openreq_child(lsk, oreq, cdev->askb);
1045 if (!newsk)
1046 goto free_oreq;
1047
1048 dst = inet_csk_route_child_sock(lsk, newsk, oreq);
1049 if (!dst)
1050 goto free_sk;
1051
1052 tcph = (struct tcphdr *)(iph + 1);
1053 n = dst_neigh_lookup(dst, &iph->saddr);
1054 if (!n)
1055 goto free_sk;
1056
1057 ndev = n->dev;
1058 if (!ndev)
1059 goto free_dst;
1060 port_id = cxgb4_port_idx(ndev);
1061
1062 csk = chtls_sock_create(cdev);
1063 if (!csk)
1064 goto free_dst;
1065
1066 csk->l2t_entry = cxgb4_l2t_get(cdev->lldi->l2t, n, ndev, 0);
1067 if (!csk->l2t_entry)
1068 goto free_csk;
1069
1070 newsk->sk_user_data = csk;
1071 newsk->sk_backlog_rcv = chtls_backlog_rcv;
1072
1073 tp = tcp_sk(newsk);
1074 newinet = inet_sk(newsk);
1075
1076 newinet->inet_daddr = iph->saddr;
1077 newinet->inet_rcv_saddr = iph->daddr;
1078 newinet->inet_saddr = iph->daddr;
1079
1080 oreq->ts_recent = PASS_OPEN_TID_G(ntohl(req->tos_stid));
1081 sk_setup_caps(newsk, dst);
1082 csk->sk = newsk;
1083 csk->passive_reap_next = oreq;
1084 csk->tx_chan = cxgb4_port_chan(ndev);
1085 csk->port_id = port_id;
1086 csk->egress_dev = ndev;
1087 csk->tos = PASS_OPEN_TOS_G(ntohl(req->tos_stid));
1088 csk->ulp_mode = ULP_MODE_TLS;
1089 step = cdev->lldi->nrxq / cdev->lldi->nchan;
1090 csk->rss_qid = cdev->lldi->rxq_ids[port_id * step];
1091 rxq_idx = port_id * step;
1092 csk->txq_idx = (rxq_idx < cdev->lldi->ntxq) ? rxq_idx :
1093 port_id * step;
1094 csk->sndbuf = newsk->sk_sndbuf;
1095 csk->smac_idx = cxgb4_tp_smt_idx(cdev->lldi->adapter_type,
1096 cxgb4_port_viid(ndev));
1097 tp->rcv_wnd = select_rcv_wnd(csk);
1098 RCV_WSCALE(tp) = select_rcv_wscale(tcp_full_space(newsk),
1099 WSCALE_OK(tp),
1100 tp->window_clamp);
1101 neigh_release(n);
1102 inet_inherit_port(&tcp_hashinfo, lsk, newsk);
1103 csk_set_flag(csk, CSK_CONN_INLINE);
1104 bh_unlock_sock(newsk); /* tcp_create_openreq_child ->sk_clone_lock */
1105
1106 return newsk;
1107 free_csk:
1108 chtls_sock_release(&csk->kref);
1109 free_dst:
1110 dst_release(dst);
1111 free_sk:
1112 inet_csk_prepare_forced_close(newsk);
1113 tcp_done(newsk);
1114 free_oreq:
1115 chtls_reqsk_free(oreq);
1116 return NULL;
1117 }
1118
1119 /*
1120 * Populate a TID_RELEASE WR. The skb must be already propely sized.
1121 */
1122 static void mk_tid_release(struct sk_buff *skb,
1123 unsigned int chan, unsigned int tid)
1124 {
1125 struct cpl_tid_release *req;
1126 unsigned int len;
1127
1128 len = roundup(sizeof(struct cpl_tid_release), 16);
1129 req = (struct cpl_tid_release *)__skb_put(skb, len);
1130 memset(req, 0, len);
1131 set_wr_txq(skb, CPL_PRIORITY_SETUP, chan);
1132 INIT_TP_WR_CPL(req, CPL_TID_RELEASE, tid);
1133 }
1134
1135 static int chtls_get_module(struct sock *sk)
1136 {
1137 struct inet_connection_sock *icsk = inet_csk(sk);
1138
1139 if (!try_module_get(icsk->icsk_ulp_ops->owner))
1140 return -1;
1141
1142 return 0;
1143 }
1144
1145 static void chtls_pass_accept_request(struct sock *sk,
1146 struct sk_buff *skb)
1147 {
1148 struct cpl_t5_pass_accept_rpl *rpl;
1149 struct cpl_pass_accept_req *req;
1150 struct listen_ctx *listen_ctx;
1151 struct request_sock *oreq;
1152 struct sk_buff *reply_skb;
1153 struct chtls_sock *csk;
1154 struct chtls_dev *cdev;
1155 struct tcphdr *tcph;
1156 struct sock *newsk;
1157 struct ethhdr *eh;
1158 struct iphdr *iph;
1159 void *network_hdr;
1160 unsigned int stid;
1161 unsigned int len;
1162 unsigned int tid;
1163
1164 req = cplhdr(skb) + RSS_HDR;
1165 tid = GET_TID(req);
1166 cdev = BLOG_SKB_CB(skb)->cdev;
1167 newsk = lookup_tid(cdev->tids, tid);
1168 stid = PASS_OPEN_TID_G(ntohl(req->tos_stid));
1169 if (newsk) {
1170 pr_info("tid (%d) already in use\n", tid);
1171 return;
1172 }
1173
1174 len = roundup(sizeof(*rpl), 16);
1175 reply_skb = alloc_skb(len, GFP_ATOMIC);
1176 if (!reply_skb) {
1177 cxgb4_remove_tid(cdev->tids, 0, tid, sk->sk_family);
1178 kfree_skb(skb);
1179 return;
1180 }
1181
1182 if (sk->sk_state != TCP_LISTEN)
1183 goto reject;
1184
1185 if (inet_csk_reqsk_queue_is_full(sk))
1186 goto reject;
1187
1188 if (sk_acceptq_is_full(sk))
1189 goto reject;
1190
1191 oreq = inet_reqsk_alloc(&chtls_rsk_ops, sk, true);
1192 if (!oreq)
1193 goto reject;
1194
1195 oreq->rsk_rcv_wnd = 0;
1196 oreq->rsk_window_clamp = 0;
1197 oreq->cookie_ts = 0;
1198 oreq->mss = 0;
1199 oreq->ts_recent = 0;
1200
1201 eh = (struct ethhdr *)(req + 1);
1202 iph = (struct iphdr *)(eh + 1);
1203 if (iph->version != 0x4)
1204 goto free_oreq;
1205
1206 network_hdr = (void *)(eh + 1);
1207 tcph = (struct tcphdr *)(iph + 1);
1208
1209 tcp_rsk(oreq)->tfo_listener = false;
1210 tcp_rsk(oreq)->rcv_isn = ntohl(tcph->seq);
1211 chtls_set_req_port(oreq, tcph->source, tcph->dest);
1212 inet_rsk(oreq)->ecn_ok = 0;
1213 chtls_set_req_addr(oreq, iph->daddr, iph->saddr);
1214 if (req->tcpopt.wsf <= 14) {
1215 inet_rsk(oreq)->wscale_ok = 1;
1216 inet_rsk(oreq)->snd_wscale = req->tcpopt.wsf;
1217 }
1218 inet_rsk(oreq)->ir_iif = sk->sk_bound_dev_if;
1219
1220 newsk = chtls_recv_sock(sk, oreq, network_hdr, req, cdev);
1221 if (!newsk)
1222 goto reject;
1223
1224 if (chtls_get_module(newsk))
1225 goto reject;
1226 inet_csk_reqsk_queue_added(sk);
1227 reply_skb->sk = newsk;
1228 chtls_install_cpl_ops(newsk);
1229 cxgb4_insert_tid(cdev->tids, newsk, tid, newsk->sk_family);
1230 csk = rcu_dereference_sk_user_data(newsk);
1231 listen_ctx = (struct listen_ctx *)lookup_stid(cdev->tids, stid);
1232 csk->listen_ctx = listen_ctx;
1233 __skb_queue_tail(&listen_ctx->synq, (struct sk_buff *)&csk->synq);
1234 chtls_pass_accept_rpl(reply_skb, req, tid);
1235 kfree_skb(skb);
1236 return;
1237
1238 free_oreq:
1239 chtls_reqsk_free(oreq);
1240 reject:
1241 mk_tid_release(reply_skb, 0, tid);
1242 cxgb4_ofld_send(cdev->lldi->ports[0], reply_skb);
1243 kfree_skb(skb);
1244 }
1245
1246 /*
1247 * Handle a CPL_PASS_ACCEPT_REQ message.
1248 */
1249 static int chtls_pass_accept_req(struct chtls_dev *cdev, struct sk_buff *skb)
1250 {
1251 struct cpl_pass_accept_req *req = cplhdr(skb) + RSS_HDR;
1252 struct listen_ctx *ctx;
1253 unsigned int stid;
1254 unsigned int tid;
1255 struct sock *lsk;
1256 void *data;
1257
1258 stid = PASS_OPEN_TID_G(ntohl(req->tos_stid));
1259 tid = GET_TID(req);
1260
1261 data = lookup_stid(cdev->tids, stid);
1262 if (!data)
1263 return 1;
1264
1265 ctx = (struct listen_ctx *)data;
1266 lsk = ctx->lsk;
1267
1268 if (unlikely(tid >= cdev->tids->ntids)) {
1269 pr_info("passive open TID %u too large\n", tid);
1270 return 1;
1271 }
1272
1273 BLOG_SKB_CB(skb)->cdev = cdev;
1274 process_cpl_msg(chtls_pass_accept_request, lsk, skb);
1275 return 0;
1276 }
1277
1278 /*
1279 * Completes some final bits of initialization for just established connections
1280 * and changes their state to TCP_ESTABLISHED.
1281 *
1282 * snd_isn here is the ISN after the SYN, i.e., the true ISN + 1.
1283 */
1284 static void make_established(struct sock *sk, u32 snd_isn, unsigned int opt)
1285 {
1286 struct tcp_sock *tp = tcp_sk(sk);
1287
1288 tp->pushed_seq = snd_isn;
1289 tp->write_seq = snd_isn;
1290 tp->snd_nxt = snd_isn;
1291 tp->snd_una = snd_isn;
1292 inet_sk(sk)->inet_id = prandom_u32();
1293 assign_rxopt(sk, opt);
1294
1295 if (tp->rcv_wnd > (RCV_BUFSIZ_M << 10))
1296 tp->rcv_wup -= tp->rcv_wnd - (RCV_BUFSIZ_M << 10);
1297
1298 smp_mb();
1299 tcp_set_state(sk, TCP_ESTABLISHED);
1300 }
1301
1302 static void chtls_abort_conn(struct sock *sk, struct sk_buff *skb)
1303 {
1304 struct sk_buff *abort_skb;
1305
1306 abort_skb = alloc_skb(sizeof(struct cpl_abort_req), GFP_ATOMIC);
1307 if (abort_skb)
1308 chtls_send_reset(sk, CPL_ABORT_SEND_RST, abort_skb);
1309 }
1310
1311 static struct sock *reap_list;
1312 static DEFINE_SPINLOCK(reap_list_lock);
1313
1314 /*
1315 * Process the reap list.
1316 */
1317 DECLARE_TASK_FUNC(process_reap_list, task_param)
1318 {
1319 spin_lock_bh(&reap_list_lock);
1320 while (reap_list) {
1321 struct sock *sk = reap_list;
1322 struct chtls_sock *csk = rcu_dereference_sk_user_data(sk);
1323
1324 reap_list = csk->passive_reap_next;
1325 csk->passive_reap_next = NULL;
1326 spin_unlock(&reap_list_lock);
1327 sock_hold(sk);
1328
1329 bh_lock_sock(sk);
1330 chtls_abort_conn(sk, NULL);
1331 sock_orphan(sk);
1332 if (sk->sk_state == TCP_CLOSE)
1333 inet_csk_destroy_sock(sk);
1334 bh_unlock_sock(sk);
1335 sock_put(sk);
1336 spin_lock(&reap_list_lock);
1337 }
1338 spin_unlock_bh(&reap_list_lock);
1339 }
1340
1341 static DECLARE_WORK(reap_task, process_reap_list);
1342
1343 static void add_to_reap_list(struct sock *sk)
1344 {
1345 struct chtls_sock *csk = sk->sk_user_data;
1346
1347 local_bh_disable();
1348 bh_lock_sock(sk);
1349 release_tcp_port(sk); /* release the port immediately */
1350
1351 spin_lock(&reap_list_lock);
1352 csk->passive_reap_next = reap_list;
1353 reap_list = sk;
1354 if (!csk->passive_reap_next)
1355 schedule_work(&reap_task);
1356 spin_unlock(&reap_list_lock);
1357 bh_unlock_sock(sk);
1358 local_bh_enable();
1359 }
1360
1361 static void add_pass_open_to_parent(struct sock *child, struct sock *lsk,
1362 struct chtls_dev *cdev)
1363 {
1364 struct request_sock *oreq;
1365 struct chtls_sock *csk;
1366
1367 if (lsk->sk_state != TCP_LISTEN)
1368 return;
1369
1370 csk = child->sk_user_data;
1371 oreq = csk->passive_reap_next;
1372 csk->passive_reap_next = NULL;
1373
1374 reqsk_queue_removed(&inet_csk(lsk)->icsk_accept_queue, oreq);
1375 __skb_unlink((struct sk_buff *)&csk->synq, &csk->listen_ctx->synq);
1376
1377 if (sk_acceptq_is_full(lsk)) {
1378 chtls_reqsk_free(oreq);
1379 add_to_reap_list(child);
1380 } else {
1381 refcount_set(&oreq->rsk_refcnt, 1);
1382 inet_csk_reqsk_queue_add(lsk, oreq, child);
1383 lsk->sk_data_ready(lsk);
1384 }
1385 }
1386
1387 static void bl_add_pass_open_to_parent(struct sock *lsk, struct sk_buff *skb)
1388 {
1389 struct sock *child = skb->sk;
1390
1391 skb->sk = NULL;
1392 add_pass_open_to_parent(child, lsk, BLOG_SKB_CB(skb)->cdev);
1393 kfree_skb(skb);
1394 }
1395
1396 static int chtls_pass_establish(struct chtls_dev *cdev, struct sk_buff *skb)
1397 {
1398 struct cpl_pass_establish *req = cplhdr(skb) + RSS_HDR;
1399 struct chtls_sock *csk;
1400 struct sock *lsk, *sk;
1401 unsigned int hwtid;
1402
1403 hwtid = GET_TID(req);
1404 sk = lookup_tid(cdev->tids, hwtid);
1405 if (!sk)
1406 return (CPL_RET_UNKNOWN_TID | CPL_RET_BUF_DONE);
1407
1408 bh_lock_sock(sk);
1409 if (unlikely(sock_owned_by_user(sk))) {
1410 kfree_skb(skb);
1411 } else {
1412 unsigned int stid;
1413 void *data;
1414
1415 csk = sk->sk_user_data;
1416 csk->wr_max_credits = 64;
1417 csk->wr_credits = 64;
1418 csk->wr_unacked = 0;
1419 make_established(sk, ntohl(req->snd_isn), ntohs(req->tcp_opt));
1420 stid = PASS_OPEN_TID_G(ntohl(req->tos_stid));
1421 sk->sk_state_change(sk);
1422 if (unlikely(sk->sk_socket))
1423 sk_wake_async(sk, 0, POLL_OUT);
1424
1425 data = lookup_stid(cdev->tids, stid);
1426 lsk = ((struct listen_ctx *)data)->lsk;
1427
1428 bh_lock_sock(lsk);
1429 if (unlikely(skb_queue_empty(&csk->listen_ctx->synq))) {
1430 /* removed from synq */
1431 bh_unlock_sock(lsk);
1432 kfree_skb(skb);
1433 goto unlock;
1434 }
1435
1436 if (likely(!sock_owned_by_user(lsk))) {
1437 kfree_skb(skb);
1438 add_pass_open_to_parent(sk, lsk, cdev);
1439 } else {
1440 skb->sk = sk;
1441 BLOG_SKB_CB(skb)->cdev = cdev;
1442 BLOG_SKB_CB(skb)->backlog_rcv =
1443 bl_add_pass_open_to_parent;
1444 __sk_add_backlog(lsk, skb);
1445 }
1446 bh_unlock_sock(lsk);
1447 }
1448 unlock:
1449 bh_unlock_sock(sk);
1450 return 0;
1451 }
1452
1453 /*
1454 * Handle receipt of an urgent pointer.
1455 */
1456 static void handle_urg_ptr(struct sock *sk, u32 urg_seq)
1457 {
1458 struct tcp_sock *tp = tcp_sk(sk);
1459
1460 urg_seq--;
1461 if (tp->urg_data && !after(urg_seq, tp->urg_seq))
1462 return; /* duplicate pointer */
1463
1464 sk_send_sigurg(sk);
1465 if (tp->urg_seq == tp->copied_seq && tp->urg_data &&
1466 !sock_flag(sk, SOCK_URGINLINE) &&
1467 tp->copied_seq != tp->rcv_nxt) {
1468 struct sk_buff *skb = skb_peek(&sk->sk_receive_queue);
1469
1470 tp->copied_seq++;
1471 if (skb && tp->copied_seq - ULP_SKB_CB(skb)->seq >= skb->len)
1472 chtls_free_skb(sk, skb);
1473 }
1474
1475 tp->urg_data = TCP_URG_NOTYET;
1476 tp->urg_seq = urg_seq;
1477 }
1478
1479 static void check_sk_callbacks(struct chtls_sock *csk)
1480 {
1481 struct sock *sk = csk->sk;
1482
1483 if (unlikely(sk->sk_user_data &&
1484 !csk_flag_nochk(csk, CSK_CALLBACKS_CHKD)))
1485 csk_set_flag(csk, CSK_CALLBACKS_CHKD);
1486 }
1487
1488 /*
1489 * Handles Rx data that arrives in a state where the socket isn't accepting
1490 * new data.
1491 */
1492 static void handle_excess_rx(struct sock *sk, struct sk_buff *skb)
1493 {
1494 if (!csk_flag(sk, CSK_ABORT_SHUTDOWN))
1495 chtls_abort_conn(sk, skb);
1496
1497 kfree_skb(skb);
1498 }
1499
1500 static void chtls_recv_data(struct sock *sk, struct sk_buff *skb)
1501 {
1502 struct cpl_rx_data *hdr = cplhdr(skb) + RSS_HDR;
1503 struct chtls_sock *csk;
1504 struct tcp_sock *tp;
1505
1506 csk = rcu_dereference_sk_user_data(sk);
1507 tp = tcp_sk(sk);
1508
1509 if (unlikely(sk->sk_shutdown & RCV_SHUTDOWN)) {
1510 handle_excess_rx(sk, skb);
1511 return;
1512 }
1513
1514 ULP_SKB_CB(skb)->seq = ntohl(hdr->seq);
1515 ULP_SKB_CB(skb)->psh = hdr->psh;
1516 skb_ulp_mode(skb) = ULP_MODE_NONE;
1517
1518 skb_reset_transport_header(skb);
1519 __skb_pull(skb, sizeof(*hdr) + RSS_HDR);
1520 if (!skb->data_len)
1521 __skb_trim(skb, ntohs(hdr->len));
1522
1523 if (unlikely(hdr->urg))
1524 handle_urg_ptr(sk, tp->rcv_nxt + ntohs(hdr->urg));
1525 if (unlikely(tp->urg_data == TCP_URG_NOTYET &&
1526 tp->urg_seq - tp->rcv_nxt < skb->len))
1527 tp->urg_data = TCP_URG_VALID |
1528 skb->data[tp->urg_seq - tp->rcv_nxt];
1529
1530 if (unlikely(hdr->dack_mode != csk->delack_mode)) {
1531 csk->delack_mode = hdr->dack_mode;
1532 csk->delack_seq = tp->rcv_nxt;
1533 }
1534
1535 tcp_hdr(skb)->fin = 0;
1536 tp->rcv_nxt += skb->len;
1537
1538 __skb_queue_tail(&sk->sk_receive_queue, skb);
1539
1540 if (!sock_flag(sk, SOCK_DEAD)) {
1541 check_sk_callbacks(csk);
1542 sk->sk_data_ready(sk);
1543 }
1544 }
1545
1546 static int chtls_rx_data(struct chtls_dev *cdev, struct sk_buff *skb)
1547 {
1548 struct cpl_rx_data *req = cplhdr(skb) + RSS_HDR;
1549 unsigned int hwtid = GET_TID(req);
1550 struct sock *sk;
1551
1552 sk = lookup_tid(cdev->tids, hwtid);
1553 if (unlikely(!sk)) {
1554 pr_err("can't find conn. for hwtid %u.\n", hwtid);
1555 return -EINVAL;
1556 }
1557 skb_dst_set(skb, NULL);
1558 process_cpl_msg(chtls_recv_data, sk, skb);
1559 return 0;
1560 }
1561
1562 static void chtls_recv_pdu(struct sock *sk, struct sk_buff *skb)
1563 {
1564 struct cpl_tls_data *hdr = cplhdr(skb);
1565 struct chtls_sock *csk;
1566 struct chtls_hws *tlsk;
1567 struct tcp_sock *tp;
1568
1569 csk = rcu_dereference_sk_user_data(sk);
1570 tlsk = &csk->tlshws;
1571 tp = tcp_sk(sk);
1572
1573 if (unlikely(sk->sk_shutdown & RCV_SHUTDOWN)) {
1574 handle_excess_rx(sk, skb);
1575 return;
1576 }
1577
1578 ULP_SKB_CB(skb)->seq = ntohl(hdr->seq);
1579 ULP_SKB_CB(skb)->flags = 0;
1580 skb_ulp_mode(skb) = ULP_MODE_TLS;
1581
1582 skb_reset_transport_header(skb);
1583 __skb_pull(skb, sizeof(*hdr));
1584 if (!skb->data_len)
1585 __skb_trim(skb,
1586 CPL_TLS_DATA_LENGTH_G(ntohl(hdr->length_pkd)));
1587
1588 if (unlikely(tp->urg_data == TCP_URG_NOTYET && tp->urg_seq -
1589 tp->rcv_nxt < skb->len))
1590 tp->urg_data = TCP_URG_VALID |
1591 skb->data[tp->urg_seq - tp->rcv_nxt];
1592
1593 tcp_hdr(skb)->fin = 0;
1594 tlsk->pldlen = CPL_TLS_DATA_LENGTH_G(ntohl(hdr->length_pkd));
1595 __skb_queue_tail(&tlsk->sk_recv_queue, skb);
1596 }
1597
1598 static int chtls_rx_pdu(struct chtls_dev *cdev, struct sk_buff *skb)
1599 {
1600 struct cpl_tls_data *req = cplhdr(skb);
1601 unsigned int hwtid = GET_TID(req);
1602 struct sock *sk;
1603
1604 sk = lookup_tid(cdev->tids, hwtid);
1605 if (unlikely(!sk)) {
1606 pr_err("can't find conn. for hwtid %u.\n", hwtid);
1607 return -EINVAL;
1608 }
1609 skb_dst_set(skb, NULL);
1610 process_cpl_msg(chtls_recv_pdu, sk, skb);
1611 return 0;
1612 }
1613
1614 static void chtls_set_hdrlen(struct sk_buff *skb, unsigned int nlen)
1615 {
1616 struct tlsrx_cmp_hdr *tls_cmp_hdr = cplhdr(skb);
1617
1618 skb->hdr_len = ntohs((__force __be16)tls_cmp_hdr->length);
1619 tls_cmp_hdr->length = ntohs((__force __be16)nlen);
1620 }
1621
1622 static void chtls_rx_hdr(struct sock *sk, struct sk_buff *skb)
1623 {
1624 struct tlsrx_cmp_hdr *tls_hdr_pkt;
1625 struct cpl_rx_tls_cmp *cmp_cpl;
1626 struct sk_buff *skb_rec;
1627 struct chtls_sock *csk;
1628 struct chtls_hws *tlsk;
1629 struct tcp_sock *tp;
1630
1631 cmp_cpl = cplhdr(skb);
1632 csk = rcu_dereference_sk_user_data(sk);
1633 tlsk = &csk->tlshws;
1634 tp = tcp_sk(sk);
1635
1636 ULP_SKB_CB(skb)->seq = ntohl(cmp_cpl->seq);
1637 ULP_SKB_CB(skb)->flags = 0;
1638
1639 skb_reset_transport_header(skb);
1640 __skb_pull(skb, sizeof(*cmp_cpl));
1641 tls_hdr_pkt = (struct tlsrx_cmp_hdr *)skb->data;
1642 if (tls_hdr_pkt->res_to_mac_error & TLSRX_HDR_PKT_ERROR_M)
1643 tls_hdr_pkt->type = CONTENT_TYPE_ERROR;
1644 if (!skb->data_len)
1645 __skb_trim(skb, TLS_HEADER_LENGTH);
1646
1647 tp->rcv_nxt +=
1648 CPL_RX_TLS_CMP_PDULENGTH_G(ntohl(cmp_cpl->pdulength_length));
1649
1650 ULP_SKB_CB(skb)->flags |= ULPCB_FLAG_TLS_HDR;
1651 skb_rec = __skb_dequeue(&tlsk->sk_recv_queue);
1652 if (!skb_rec) {
1653 __skb_queue_tail(&sk->sk_receive_queue, skb);
1654 } else {
1655 chtls_set_hdrlen(skb, tlsk->pldlen);
1656 tlsk->pldlen = 0;
1657 __skb_queue_tail(&sk->sk_receive_queue, skb);
1658 __skb_queue_tail(&sk->sk_receive_queue, skb_rec);
1659 }
1660
1661 if (!sock_flag(sk, SOCK_DEAD)) {
1662 check_sk_callbacks(csk);
1663 sk->sk_data_ready(sk);
1664 }
1665 }
1666
1667 static int chtls_rx_cmp(struct chtls_dev *cdev, struct sk_buff *skb)
1668 {
1669 struct cpl_rx_tls_cmp *req = cplhdr(skb);
1670 unsigned int hwtid = GET_TID(req);
1671 struct sock *sk;
1672
1673 sk = lookup_tid(cdev->tids, hwtid);
1674 if (unlikely(!sk)) {
1675 pr_err("can't find conn. for hwtid %u.\n", hwtid);
1676 return -EINVAL;
1677 }
1678 skb_dst_set(skb, NULL);
1679 process_cpl_msg(chtls_rx_hdr, sk, skb);
1680
1681 return 0;
1682 }
1683
1684 static void chtls_timewait(struct sock *sk)
1685 {
1686 struct tcp_sock *tp = tcp_sk(sk);
1687
1688 tp->rcv_nxt++;
1689 tp->rx_opt.ts_recent_stamp = ktime_get_seconds();
1690 tp->srtt_us = 0;
1691 tcp_time_wait(sk, TCP_TIME_WAIT, 0);
1692 }
1693
1694 static void chtls_peer_close(struct sock *sk, struct sk_buff *skb)
1695 {
1696 struct chtls_sock *csk = rcu_dereference_sk_user_data(sk);
1697
1698 sk->sk_shutdown |= RCV_SHUTDOWN;
1699 sock_set_flag(sk, SOCK_DONE);
1700
1701 switch (sk->sk_state) {
1702 case TCP_SYN_RECV:
1703 case TCP_ESTABLISHED:
1704 tcp_set_state(sk, TCP_CLOSE_WAIT);
1705 break;
1706 case TCP_FIN_WAIT1:
1707 tcp_set_state(sk, TCP_CLOSING);
1708 break;
1709 case TCP_FIN_WAIT2:
1710 chtls_release_resources(sk);
1711 if (csk_flag_nochk(csk, CSK_ABORT_RPL_PENDING))
1712 chtls_conn_done(sk);
1713 else
1714 chtls_timewait(sk);
1715 break;
1716 default:
1717 pr_info("cpl_peer_close in bad state %d\n", sk->sk_state);
1718 }
1719
1720 if (!sock_flag(sk, SOCK_DEAD)) {
1721 sk->sk_state_change(sk);
1722 /* Do not send POLL_HUP for half duplex close. */
1723
1724 if ((sk->sk_shutdown & SEND_SHUTDOWN) ||
1725 sk->sk_state == TCP_CLOSE)
1726 sk_wake_async(sk, SOCK_WAKE_WAITD, POLL_HUP);
1727 else
1728 sk_wake_async(sk, SOCK_WAKE_WAITD, POLL_IN);
1729 }
1730 kfree_skb(skb);
1731 }
1732
1733 static void chtls_close_con_rpl(struct sock *sk, struct sk_buff *skb)
1734 {
1735 struct cpl_close_con_rpl *rpl = cplhdr(skb) + RSS_HDR;
1736 struct chtls_sock *csk;
1737 struct tcp_sock *tp;
1738
1739 csk = rcu_dereference_sk_user_data(sk);
1740 tp = tcp_sk(sk);
1741
1742 tp->snd_una = ntohl(rpl->snd_nxt) - 1; /* exclude FIN */
1743
1744 switch (sk->sk_state) {
1745 case TCP_CLOSING:
1746 chtls_release_resources(sk);
1747 if (csk_flag_nochk(csk, CSK_ABORT_RPL_PENDING))
1748 chtls_conn_done(sk);
1749 else
1750 chtls_timewait(sk);
1751 break;
1752 case TCP_LAST_ACK:
1753 chtls_release_resources(sk);
1754 chtls_conn_done(sk);
1755 break;
1756 case TCP_FIN_WAIT1:
1757 tcp_set_state(sk, TCP_FIN_WAIT2);
1758 sk->sk_shutdown |= SEND_SHUTDOWN;
1759
1760 if (!sock_flag(sk, SOCK_DEAD))
1761 sk->sk_state_change(sk);
1762 else if (tcp_sk(sk)->linger2 < 0 &&
1763 !csk_flag_nochk(csk, CSK_ABORT_SHUTDOWN))
1764 chtls_abort_conn(sk, skb);
1765 break;
1766 default:
1767 pr_info("close_con_rpl in bad state %d\n", sk->sk_state);
1768 }
1769 kfree_skb(skb);
1770 }
1771
1772 static struct sk_buff *get_cpl_skb(struct sk_buff *skb,
1773 size_t len, gfp_t gfp)
1774 {
1775 if (likely(!skb_is_nonlinear(skb) && !skb_cloned(skb))) {
1776 WARN_ONCE(skb->len < len, "skb alloc error");
1777 __skb_trim(skb, len);
1778 skb_get(skb);
1779 } else {
1780 skb = alloc_skb(len, gfp);
1781 if (skb)
1782 __skb_put(skb, len);
1783 }
1784 return skb;
1785 }
1786
1787 static void set_abort_rpl_wr(struct sk_buff *skb, unsigned int tid,
1788 int cmd)
1789 {
1790 struct cpl_abort_rpl *rpl = cplhdr(skb);
1791
1792 INIT_TP_WR_CPL(rpl, CPL_ABORT_RPL, tid);
1793 rpl->cmd = cmd;
1794 }
1795
1796 static void send_defer_abort_rpl(struct chtls_dev *cdev, struct sk_buff *skb)
1797 {
1798 struct cpl_abort_req_rss *req = cplhdr(skb);
1799 struct sk_buff *reply_skb;
1800
1801 reply_skb = alloc_skb(sizeof(struct cpl_abort_rpl),
1802 GFP_KERNEL | __GFP_NOFAIL);
1803 __skb_put(reply_skb, sizeof(struct cpl_abort_rpl));
1804 set_abort_rpl_wr(reply_skb, GET_TID(req),
1805 (req->status & CPL_ABORT_NO_RST));
1806 set_wr_txq(reply_skb, CPL_PRIORITY_DATA, req->status >> 1);
1807 cxgb4_ofld_send(cdev->lldi->ports[0], reply_skb);
1808 kfree_skb(skb);
1809 }
1810
1811 static void send_abort_rpl(struct sock *sk, struct sk_buff *skb,
1812 struct chtls_dev *cdev, int status, int queue)
1813 {
1814 struct cpl_abort_req_rss *req = cplhdr(skb);
1815 struct sk_buff *reply_skb;
1816 struct chtls_sock *csk;
1817
1818 csk = rcu_dereference_sk_user_data(sk);
1819
1820 reply_skb = alloc_skb(sizeof(struct cpl_abort_rpl),
1821 GFP_KERNEL);
1822
1823 if (!reply_skb) {
1824 req->status = (queue << 1);
1825 send_defer_abort_rpl(cdev, skb);
1826 return;
1827 }
1828
1829 set_abort_rpl_wr(reply_skb, GET_TID(req), status);
1830 kfree_skb(skb);
1831
1832 set_wr_txq(reply_skb, CPL_PRIORITY_DATA, queue);
1833 if (csk_conn_inline(csk)) {
1834 struct l2t_entry *e = csk->l2t_entry;
1835
1836 if (e && sk->sk_state != TCP_SYN_RECV) {
1837 cxgb4_l2t_send(csk->egress_dev, reply_skb, e);
1838 return;
1839 }
1840 }
1841 cxgb4_ofld_send(cdev->lldi->ports[0], reply_skb);
1842 }
1843
1844 /*
1845 * Add an skb to the deferred skb queue for processing from process context.
1846 */
1847 static void t4_defer_reply(struct sk_buff *skb, struct chtls_dev *cdev,
1848 defer_handler_t handler)
1849 {
1850 DEFERRED_SKB_CB(skb)->handler = handler;
1851 spin_lock_bh(&cdev->deferq.lock);
1852 __skb_queue_tail(&cdev->deferq, skb);
1853 if (skb_queue_len(&cdev->deferq) == 1)
1854 schedule_work(&cdev->deferq_task);
1855 spin_unlock_bh(&cdev->deferq.lock);
1856 }
1857
1858 static void chtls_send_abort_rpl(struct sock *sk, struct sk_buff *skb,
1859 struct chtls_dev *cdev,
1860 int status, int queue)
1861 {
1862 struct cpl_abort_req_rss *req = cplhdr(skb) + RSS_HDR;
1863 struct sk_buff *reply_skb;
1864 struct chtls_sock *csk;
1865 unsigned int tid;
1866
1867 csk = rcu_dereference_sk_user_data(sk);
1868 tid = GET_TID(req);
1869
1870 reply_skb = get_cpl_skb(skb, sizeof(struct cpl_abort_rpl), gfp_any());
1871 if (!reply_skb) {
1872 req->status = (queue << 1) | status;
1873 t4_defer_reply(skb, cdev, send_defer_abort_rpl);
1874 return;
1875 }
1876
1877 set_abort_rpl_wr(reply_skb, tid, status);
1878 set_wr_txq(reply_skb, CPL_PRIORITY_DATA, queue);
1879 if (csk_conn_inline(csk)) {
1880 struct l2t_entry *e = csk->l2t_entry;
1881
1882 if (e && sk->sk_state != TCP_SYN_RECV) {
1883 cxgb4_l2t_send(csk->egress_dev, reply_skb, e);
1884 return;
1885 }
1886 }
1887 cxgb4_ofld_send(cdev->lldi->ports[0], reply_skb);
1888 kfree_skb(skb);
1889 }
1890
1891 /*
1892 * This is run from a listener's backlog to abort a child connection in
1893 * SYN_RCV state (i.e., one on the listener's SYN queue).
1894 */
1895 static void bl_abort_syn_rcv(struct sock *lsk, struct sk_buff *skb)
1896 {
1897 struct chtls_sock *csk;
1898 struct sock *child;
1899 int queue;
1900
1901 child = skb->sk;
1902 csk = rcu_dereference_sk_user_data(child);
1903 queue = csk->txq_idx;
1904
1905 skb->sk = NULL;
1906 do_abort_syn_rcv(child, lsk);
1907 send_abort_rpl(child, skb, BLOG_SKB_CB(skb)->cdev,
1908 CPL_ABORT_NO_RST, queue);
1909 }
1910
1911 static int abort_syn_rcv(struct sock *sk, struct sk_buff *skb)
1912 {
1913 const struct request_sock *oreq;
1914 struct listen_ctx *listen_ctx;
1915 struct chtls_sock *csk;
1916 struct chtls_dev *cdev;
1917 struct sock *psk;
1918 void *ctx;
1919
1920 csk = sk->sk_user_data;
1921 oreq = csk->passive_reap_next;
1922 cdev = csk->cdev;
1923
1924 if (!oreq)
1925 return -1;
1926
1927 ctx = lookup_stid(cdev->tids, oreq->ts_recent);
1928 if (!ctx)
1929 return -1;
1930
1931 listen_ctx = (struct listen_ctx *)ctx;
1932 psk = listen_ctx->lsk;
1933
1934 bh_lock_sock(psk);
1935 if (!sock_owned_by_user(psk)) {
1936 int queue = csk->txq_idx;
1937
1938 do_abort_syn_rcv(sk, psk);
1939 send_abort_rpl(sk, skb, cdev, CPL_ABORT_NO_RST, queue);
1940 } else {
1941 skb->sk = sk;
1942 BLOG_SKB_CB(skb)->backlog_rcv = bl_abort_syn_rcv;
1943 __sk_add_backlog(psk, skb);
1944 }
1945 bh_unlock_sock(psk);
1946 return 0;
1947 }
1948
1949 static void chtls_abort_req_rss(struct sock *sk, struct sk_buff *skb)
1950 {
1951 const struct cpl_abort_req_rss *req = cplhdr(skb) + RSS_HDR;
1952 struct chtls_sock *csk = sk->sk_user_data;
1953 int rst_status = CPL_ABORT_NO_RST;
1954 int queue = csk->txq_idx;
1955
1956 if (is_neg_adv(req->status)) {
1957 if (sk->sk_state == TCP_SYN_RECV)
1958 chtls_set_tcb_tflag(sk, 0, 0);
1959
1960 kfree_skb(skb);
1961 return;
1962 }
1963
1964 csk_reset_flag(csk, CSK_ABORT_REQ_RCVD);
1965
1966 if (!csk_flag_nochk(csk, CSK_ABORT_SHUTDOWN) &&
1967 !csk_flag_nochk(csk, CSK_TX_DATA_SENT)) {
1968 struct tcp_sock *tp = tcp_sk(sk);
1969
1970 if (send_tx_flowc_wr(sk, 0, tp->snd_nxt, tp->rcv_nxt) < 0)
1971 WARN_ONCE(1, "send_tx_flowc error");
1972 csk_set_flag(csk, CSK_TX_DATA_SENT);
1973 }
1974
1975 csk_set_flag(csk, CSK_ABORT_SHUTDOWN);
1976
1977 if (!csk_flag_nochk(csk, CSK_ABORT_RPL_PENDING)) {
1978 sk->sk_err = ETIMEDOUT;
1979
1980 if (!sock_flag(sk, SOCK_DEAD))
1981 sk->sk_error_report(sk);
1982
1983 if (sk->sk_state == TCP_SYN_RECV && !abort_syn_rcv(sk, skb))
1984 return;
1985
1986 chtls_release_resources(sk);
1987 chtls_conn_done(sk);
1988 }
1989
1990 chtls_send_abort_rpl(sk, skb, csk->cdev, rst_status, queue);
1991 }
1992
1993 static void chtls_abort_rpl_rss(struct sock *sk, struct sk_buff *skb)
1994 {
1995 struct cpl_abort_rpl_rss *rpl = cplhdr(skb) + RSS_HDR;
1996 struct chtls_sock *csk;
1997 struct chtls_dev *cdev;
1998
1999 csk = rcu_dereference_sk_user_data(sk);
2000 cdev = csk->cdev;
2001
2002 if (csk_flag_nochk(csk, CSK_ABORT_RPL_PENDING)) {
2003 csk_reset_flag(csk, CSK_ABORT_RPL_PENDING);
2004 if (!csk_flag_nochk(csk, CSK_ABORT_REQ_RCVD)) {
2005 if (sk->sk_state == TCP_SYN_SENT) {
2006 cxgb4_remove_tid(cdev->tids,
2007 csk->port_id,
2008 GET_TID(rpl),
2009 sk->sk_family);
2010 sock_put(sk);
2011 }
2012 chtls_release_resources(sk);
2013 chtls_conn_done(sk);
2014 }
2015 }
2016 kfree_skb(skb);
2017 }
2018
2019 static int chtls_conn_cpl(struct chtls_dev *cdev, struct sk_buff *skb)
2020 {
2021 struct cpl_peer_close *req = cplhdr(skb) + RSS_HDR;
2022 void (*fn)(struct sock *sk, struct sk_buff *skb);
2023 unsigned int hwtid = GET_TID(req);
2024 struct sock *sk;
2025 u8 opcode;
2026
2027 opcode = ((const struct rss_header *)cplhdr(skb))->opcode;
2028
2029 sk = lookup_tid(cdev->tids, hwtid);
2030 if (!sk)
2031 goto rel_skb;
2032
2033 switch (opcode) {
2034 case CPL_PEER_CLOSE:
2035 fn = chtls_peer_close;
2036 break;
2037 case CPL_CLOSE_CON_RPL:
2038 fn = chtls_close_con_rpl;
2039 break;
2040 case CPL_ABORT_REQ_RSS:
2041 fn = chtls_abort_req_rss;
2042 break;
2043 case CPL_ABORT_RPL_RSS:
2044 fn = chtls_abort_rpl_rss;
2045 break;
2046 default:
2047 goto rel_skb;
2048 }
2049
2050 process_cpl_msg(fn, sk, skb);
2051 return 0;
2052
2053 rel_skb:
2054 kfree_skb(skb);
2055 return 0;
2056 }
2057
2058 static void chtls_rx_ack(struct sock *sk, struct sk_buff *skb)
2059 {
2060 struct cpl_fw4_ack *hdr = cplhdr(skb) + RSS_HDR;
2061 struct chtls_sock *csk = sk->sk_user_data;
2062 struct tcp_sock *tp = tcp_sk(sk);
2063 u32 credits = hdr->credits;
2064 u32 snd_una;
2065
2066 snd_una = ntohl(hdr->snd_una);
2067 csk->wr_credits += credits;
2068
2069 if (csk->wr_unacked > csk->wr_max_credits - csk->wr_credits)
2070 csk->wr_unacked = csk->wr_max_credits - csk->wr_credits;
2071
2072 while (credits) {
2073 struct sk_buff *pskb = csk->wr_skb_head;
2074 u32 csum;
2075
2076 if (unlikely(!pskb)) {
2077 if (csk->wr_nondata)
2078 csk->wr_nondata -= credits;
2079 break;
2080 }
2081 csum = (__force u32)pskb->csum;
2082 if (unlikely(credits < csum)) {
2083 pskb->csum = (__force __wsum)(csum - credits);
2084 break;
2085 }
2086 dequeue_wr(sk);
2087 credits -= csum;
2088 kfree_skb(pskb);
2089 }
2090 if (hdr->seq_vld & CPL_FW4_ACK_FLAGS_SEQVAL) {
2091 if (unlikely(before(snd_una, tp->snd_una))) {
2092 kfree_skb(skb);
2093 return;
2094 }
2095
2096 if (tp->snd_una != snd_una) {
2097 tp->snd_una = snd_una;
2098 tp->rcv_tstamp = tcp_time_stamp(tp);
2099 if (tp->snd_una == tp->snd_nxt &&
2100 !csk_flag_nochk(csk, CSK_TX_FAILOVER))
2101 csk_reset_flag(csk, CSK_TX_WAIT_IDLE);
2102 }
2103 }
2104
2105 if (hdr->seq_vld & CPL_FW4_ACK_FLAGS_CH) {
2106 unsigned int fclen16 = roundup(failover_flowc_wr_len, 16);
2107
2108 csk->wr_credits -= fclen16;
2109 csk_reset_flag(csk, CSK_TX_WAIT_IDLE);
2110 csk_reset_flag(csk, CSK_TX_FAILOVER);
2111 }
2112 if (skb_queue_len(&csk->txq) && chtls_push_frames(csk, 0))
2113 sk->sk_write_space(sk);
2114
2115 kfree_skb(skb);
2116 }
2117
2118 static int chtls_wr_ack(struct chtls_dev *cdev, struct sk_buff *skb)
2119 {
2120 struct cpl_fw4_ack *rpl = cplhdr(skb) + RSS_HDR;
2121 unsigned int hwtid = GET_TID(rpl);
2122 struct sock *sk;
2123
2124 sk = lookup_tid(cdev->tids, hwtid);
2125 if (unlikely(!sk)) {
2126 pr_err("can't find conn. for hwtid %u.\n", hwtid);
2127 return -EINVAL;
2128 }
2129 process_cpl_msg(chtls_rx_ack, sk, skb);
2130
2131 return 0;
2132 }
2133
2134 chtls_handler_func chtls_handlers[NUM_CPL_CMDS] = {
2135 [CPL_PASS_OPEN_RPL] = chtls_pass_open_rpl,
2136 [CPL_CLOSE_LISTSRV_RPL] = chtls_close_listsrv_rpl,
2137 [CPL_PASS_ACCEPT_REQ] = chtls_pass_accept_req,
2138 [CPL_PASS_ESTABLISH] = chtls_pass_establish,
2139 [CPL_RX_DATA] = chtls_rx_data,
2140 [CPL_TLS_DATA] = chtls_rx_pdu,
2141 [CPL_RX_TLS_CMP] = chtls_rx_cmp,
2142 [CPL_PEER_CLOSE] = chtls_conn_cpl,
2143 [CPL_CLOSE_CON_RPL] = chtls_conn_cpl,
2144 [CPL_ABORT_REQ_RSS] = chtls_conn_cpl,
2145 [CPL_ABORT_RPL_RSS] = chtls_conn_cpl,
2146 [CPL_FW4_ACK] = chtls_wr_ack,
2147 };
Linux with added FPC-III support