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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / crypto / chelsio / chtls / chtls_cm.c
blob9b2745ad9e380542d3a021a6596f30e9312c2ab3
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (c) 2018 Chelsio Communications, Inc.
4 *
5 * Written by: Atul Gupta (atul.gupta@chelsio.com)
6 */
7
8 #include <linux/module.h>
9 #include <linux/list.h>
10 #include <linux/workqueue.h>
11 #include <linux/skbuff.h>
12 #include <linux/timer.h>
13 #include <linux/notifier.h>
14 #include <linux/inetdevice.h>
15 #include <linux/ip.h>
16 #include <linux/tcp.h>
17 #include <linux/sched/signal.h>
18 #include <linux/kallsyms.h>
19 #include <linux/kprobes.h>
20 #include <linux/if_vlan.h>
21 #include <net/inet_common.h>
22 #include <net/tcp.h>
23 #include <net/dst.h>
24 #include <net/tls.h>
25
26 #include "chtls.h"
27 #include "chtls_cm.h"
28
29 /*
30 * State transitions and actions for close. Note that if we are in SYN_SENT
31 * we remain in that state as we cannot control a connection while it's in
32 * SYN_SENT; such connections are allowed to establish and are then aborted.
33 */
34 static unsigned char new_state[16] = {
35 /* current state: new state: action: */
36 /* (Invalid) */ TCP_CLOSE,
37 /* TCP_ESTABLISHED */ TCP_FIN_WAIT1 | TCP_ACTION_FIN,
38 /* TCP_SYN_SENT */ TCP_SYN_SENT,
39 /* TCP_SYN_RECV */ TCP_FIN_WAIT1 | TCP_ACTION_FIN,
40 /* TCP_FIN_WAIT1 */ TCP_FIN_WAIT1,
41 /* TCP_FIN_WAIT2 */ TCP_FIN_WAIT2,
42 /* TCP_TIME_WAIT */ TCP_CLOSE,
43 /* TCP_CLOSE */ TCP_CLOSE,
44 /* TCP_CLOSE_WAIT */ TCP_LAST_ACK | TCP_ACTION_FIN,
45 /* TCP_LAST_ACK */ TCP_LAST_ACK,
46 /* TCP_LISTEN */ TCP_CLOSE,
47 /* TCP_CLOSING */ TCP_CLOSING,
48 };
49
50 static struct chtls_sock *chtls_sock_create(struct chtls_dev *cdev)
51 {
52 struct chtls_sock *csk = kzalloc(sizeof(*csk), GFP_ATOMIC);
53
54 if (!csk)
55 return NULL;
56
57 csk->txdata_skb_cache = alloc_skb(TXDATA_SKB_LEN, GFP_ATOMIC);
58 if (!csk->txdata_skb_cache) {
59 kfree(csk);
60 return NULL;
61 }
62
63 kref_init(&csk->kref);
64 csk->cdev = cdev;
65 skb_queue_head_init(&csk->txq);
66 csk->wr_skb_head = NULL;
67 csk->wr_skb_tail = NULL;
68 csk->mss = MAX_MSS;
69 csk->tlshws.ofld = 1;
70 csk->tlshws.txkey = -1;
71 csk->tlshws.rxkey = -1;
72 csk->tlshws.mfs = TLS_MFS;
73 skb_queue_head_init(&csk->tlshws.sk_recv_queue);
74 return csk;
75 }
76
77 static void chtls_sock_release(struct kref *ref)
78 {
79 struct chtls_sock *csk =
80 container_of(ref, struct chtls_sock, kref);
81
82 kfree(csk);
83 }
84
85 static struct net_device *chtls_ipv4_netdev(struct chtls_dev *cdev,
86 struct sock *sk)
87 {
88 struct net_device *ndev = cdev->ports[0];
89
90 if (likely(!inet_sk(sk)->inet_rcv_saddr))
91 return ndev;
92
93 ndev = ip_dev_find(&init_net, inet_sk(sk)->inet_rcv_saddr);
94 if (!ndev)
95 return NULL;
96
97 if (is_vlan_dev(ndev))
98 return vlan_dev_real_dev(ndev);
99 return ndev;
100 }
101
102 static void assign_rxopt(struct sock *sk, unsigned int opt)
103 {
104 const struct chtls_dev *cdev;
105 struct chtls_sock *csk;
106 struct tcp_sock *tp;
107
108 csk = rcu_dereference_sk_user_data(sk);
109 tp = tcp_sk(sk);
110
111 cdev = csk->cdev;
112 tp->tcp_header_len = sizeof(struct tcphdr);
113 tp->rx_opt.mss_clamp = cdev->mtus[TCPOPT_MSS_G(opt)] - 40;
114 tp->mss_cache = tp->rx_opt.mss_clamp;
115 tp->rx_opt.tstamp_ok = TCPOPT_TSTAMP_G(opt);
116 tp->rx_opt.snd_wscale = TCPOPT_SACK_G(opt);
117 tp->rx_opt.wscale_ok = TCPOPT_WSCALE_OK_G(opt);
118 SND_WSCALE(tp) = TCPOPT_SND_WSCALE_G(opt);
119 if (!tp->rx_opt.wscale_ok)
120 tp->rx_opt.rcv_wscale = 0;
121 if (tp->rx_opt.tstamp_ok) {
122 tp->tcp_header_len += TCPOLEN_TSTAMP_ALIGNED;
123 tp->rx_opt.mss_clamp -= TCPOLEN_TSTAMP_ALIGNED;
124 } else if (csk->opt2 & TSTAMPS_EN_F) {
125 csk->opt2 &= ~TSTAMPS_EN_F;
126 csk->mtu_idx = TCPOPT_MSS_G(opt);
127 }
128 }
129
130 static void chtls_purge_receive_queue(struct sock *sk)
131 {
132 struct sk_buff *skb;
133
134 while ((skb = __skb_dequeue(&sk->sk_receive_queue)) != NULL) {
135 skb_dst_set(skb, (void *)NULL);
136 kfree_skb(skb);
137 }
138 }
139
140 static void chtls_purge_write_queue(struct sock *sk)
141 {
142 struct chtls_sock *csk = rcu_dereference_sk_user_data(sk);
143 struct sk_buff *skb;
144
145 while ((skb = __skb_dequeue(&csk->txq))) {
146 sk->sk_wmem_queued -= skb->truesize;
147 __kfree_skb(skb);
148 }
149 }
150
151 static void chtls_purge_recv_queue(struct sock *sk)
152 {
153 struct chtls_sock *csk = rcu_dereference_sk_user_data(sk);
154 struct chtls_hws *tlsk = &csk->tlshws;
155 struct sk_buff *skb;
156
157 while ((skb = __skb_dequeue(&tlsk->sk_recv_queue)) != NULL) {
158 skb_dst_set(skb, NULL);
159 kfree_skb(skb);
160 }
161 }
162
163 static void abort_arp_failure(void *handle, struct sk_buff *skb)
164 {
165 struct cpl_abort_req *req = cplhdr(skb);
166 struct chtls_dev *cdev;
167
168 cdev = (struct chtls_dev *)handle;
169 req->cmd = CPL_ABORT_NO_RST;
170 cxgb4_ofld_send(cdev->lldi->ports[0], skb);
171 }
172
173 static struct sk_buff *alloc_ctrl_skb(struct sk_buff *skb, int len)
174 {
175 if (likely(skb && !skb_shared(skb) && !skb_cloned(skb))) {
176 __skb_trim(skb, 0);
177 refcount_add(2, &skb->users);
178 } else {
179 skb = alloc_skb(len, GFP_KERNEL | __GFP_NOFAIL);
180 }
181 return skb;
182 }
183
184 static void chtls_send_abort(struct sock *sk, int mode, struct sk_buff *skb)
185 {
186 struct cpl_abort_req *req;
187 struct chtls_sock *csk;
188 struct tcp_sock *tp;
189
190 csk = rcu_dereference_sk_user_data(sk);
191 tp = tcp_sk(sk);
192
193 if (!skb)
194 skb = alloc_ctrl_skb(csk->txdata_skb_cache, sizeof(*req));
195
196 req = (struct cpl_abort_req *)skb_put(skb, sizeof(*req));
197 INIT_TP_WR_CPL(req, CPL_ABORT_REQ, csk->tid);
198 skb_set_queue_mapping(skb, (csk->txq_idx << 1) | CPL_PRIORITY_DATA);
199 req->rsvd0 = htonl(tp->snd_nxt);
200 req->rsvd1 = !csk_flag_nochk(csk, CSK_TX_DATA_SENT);
201 req->cmd = mode;
202 t4_set_arp_err_handler(skb, csk->cdev, abort_arp_failure);
203 send_or_defer(sk, tp, skb, mode == CPL_ABORT_SEND_RST);
204 }
205
206 static void chtls_send_reset(struct sock *sk, int mode, struct sk_buff *skb)
207 {
208 struct chtls_sock *csk = rcu_dereference_sk_user_data(sk);
209
210 if (unlikely(csk_flag_nochk(csk, CSK_ABORT_SHUTDOWN) ||
211 !csk->cdev)) {
212 if (sk->sk_state == TCP_SYN_RECV)
213 csk_set_flag(csk, CSK_RST_ABORTED);
214 goto out;
215 }
216
217 if (!csk_flag_nochk(csk, CSK_TX_DATA_SENT)) {
218 struct tcp_sock *tp = tcp_sk(sk);
219
220 if (send_tx_flowc_wr(sk, 0, tp->snd_nxt, tp->rcv_nxt) < 0)
221 WARN_ONCE(1, "send tx flowc error");
222 csk_set_flag(csk, CSK_TX_DATA_SENT);
223 }
224
225 csk_set_flag(csk, CSK_ABORT_RPL_PENDING);
226 chtls_purge_write_queue(sk);
227
228 csk_set_flag(csk, CSK_ABORT_SHUTDOWN);
229 if (sk->sk_state != TCP_SYN_RECV)
230 chtls_send_abort(sk, mode, skb);
231 else
232 goto out;
233
234 return;
235 out:
236 kfree_skb(skb);
237 }
238
239 static void release_tcp_port(struct sock *sk)
240 {
241 if (inet_csk(sk)->icsk_bind_hash)
242 inet_put_port(sk);
243 }
244
245 static void tcp_uncork(struct sock *sk)
246 {
247 struct tcp_sock *tp = tcp_sk(sk);
248
249 if (tp->nonagle & TCP_NAGLE_CORK) {
250 tp->nonagle &= ~TCP_NAGLE_CORK;
251 chtls_tcp_push(sk, 0);
252 }
253 }
254
255 static void chtls_close_conn(struct sock *sk)
256 {
257 struct cpl_close_con_req *req;
258 struct chtls_sock *csk;
259 struct sk_buff *skb;
260 unsigned int tid;
261 unsigned int len;
262
263 len = roundup(sizeof(struct cpl_close_con_req), 16);
264 csk = rcu_dereference_sk_user_data(sk);
265 tid = csk->tid;
266
267 skb = alloc_skb(len, GFP_KERNEL | __GFP_NOFAIL);
268 req = (struct cpl_close_con_req *)__skb_put(skb, len);
269 memset(req, 0, len);
270 req->wr.wr_hi = htonl(FW_WR_OP_V(FW_TP_WR) |
271 FW_WR_IMMDLEN_V(sizeof(*req) -
272 sizeof(req->wr)));
273 req->wr.wr_mid = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*req), 16)) |
274 FW_WR_FLOWID_V(tid));
275
276 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid));
277
278 tcp_uncork(sk);
279 skb_entail(sk, skb, ULPCB_FLAG_NO_HDR | ULPCB_FLAG_NO_APPEND);
280 if (sk->sk_state != TCP_SYN_SENT)
281 chtls_push_frames(csk, 1);
282 }
283
284 /*
285 * Perform a state transition during close and return the actions indicated
286 * for the transition. Do not make this function inline, the main reason
287 * it exists at all is to avoid multiple inlining of tcp_set_state.
288 */
289 static int make_close_transition(struct sock *sk)
290 {
291 int next = (int)new_state[sk->sk_state];
292
293 tcp_set_state(sk, next & TCP_STATE_MASK);
294 return next & TCP_ACTION_FIN;
295 }
296
297 void chtls_close(struct sock *sk, long timeout)
298 {
299 int data_lost, prev_state;
300 struct chtls_sock *csk;
301
302 csk = rcu_dereference_sk_user_data(sk);
303
304 lock_sock(sk);
305 sk->sk_shutdown |= SHUTDOWN_MASK;
306
307 data_lost = skb_queue_len(&sk->sk_receive_queue);
308 data_lost |= skb_queue_len(&csk->tlshws.sk_recv_queue);
309 chtls_purge_recv_queue(sk);
310 chtls_purge_receive_queue(sk);
311
312 if (sk->sk_state == TCP_CLOSE) {
313 goto wait;
314 } else if (data_lost || sk->sk_state == TCP_SYN_SENT) {
315 chtls_send_reset(sk, CPL_ABORT_SEND_RST, NULL);
316 release_tcp_port(sk);
317 goto unlock;
318 } else if (sock_flag(sk, SOCK_LINGER) && !sk->sk_lingertime) {
319 sk->sk_prot->disconnect(sk, 0);
320 } else if (make_close_transition(sk)) {
321 chtls_close_conn(sk);
322 }
323 wait:
324 if (timeout)
325 sk_stream_wait_close(sk, timeout);
326
327 unlock:
328 prev_state = sk->sk_state;
329 sock_hold(sk);
330 sock_orphan(sk);
331
332 release_sock(sk);
333
334 local_bh_disable();
335 bh_lock_sock(sk);
336
337 if (prev_state != TCP_CLOSE && sk->sk_state == TCP_CLOSE)
338 goto out;
339
340 if (sk->sk_state == TCP_FIN_WAIT2 && tcp_sk(sk)->linger2 < 0 &&
341 !csk_flag(sk, CSK_ABORT_SHUTDOWN)) {
342 struct sk_buff *skb;
343
344 skb = alloc_skb(sizeof(struct cpl_abort_req), GFP_ATOMIC);
345 if (skb)
346 chtls_send_reset(sk, CPL_ABORT_SEND_RST, skb);
347 }
348
349 if (sk->sk_state == TCP_CLOSE)
350 inet_csk_destroy_sock(sk);
351
352 out:
353 bh_unlock_sock(sk);
354 local_bh_enable();
355 sock_put(sk);
356 }
357
358 /*
359 * Wait until a socket enters on of the given states.
360 */
361 static int wait_for_states(struct sock *sk, unsigned int states)
362 {
363 DECLARE_WAITQUEUE(wait, current);
364 struct socket_wq _sk_wq;
365 long current_timeo;
366 int err = 0;
367
368 current_timeo = 200;
369
370 /*
371 * We want this to work even when there's no associated struct socket.
372 * In that case we provide a temporary wait_queue_head_t.
373 */
374 if (!sk->sk_wq) {
375 init_waitqueue_head(&_sk_wq.wait);
376 _sk_wq.fasync_list = NULL;
377 init_rcu_head_on_stack(&_sk_wq.rcu);
378 RCU_INIT_POINTER(sk->sk_wq, &_sk_wq);
379 }
380
381 add_wait_queue(sk_sleep(sk), &wait);
382 while (!sk_in_state(sk, states)) {
383 if (!current_timeo) {
384 err = -EBUSY;
385 break;
386 }
387 if (signal_pending(current)) {
388 err = sock_intr_errno(current_timeo);
389 break;
390 }
391 set_current_state(TASK_UNINTERRUPTIBLE);
392 release_sock(sk);
393 if (!sk_in_state(sk, states))
394 current_timeo = schedule_timeout(current_timeo);
395 __set_current_state(TASK_RUNNING);
396 lock_sock(sk);
397 }
398 remove_wait_queue(sk_sleep(sk), &wait);
399
400 if (rcu_dereference(sk->sk_wq) == &_sk_wq)
401 sk->sk_wq = NULL;
402 return err;
403 }
404
405 int chtls_disconnect(struct sock *sk, int flags)
406 {
407 struct tcp_sock *tp;
408 int err;
409
410 tp = tcp_sk(sk);
411 chtls_purge_recv_queue(sk);
412 chtls_purge_receive_queue(sk);
413 chtls_purge_write_queue(sk);
414
415 if (sk->sk_state != TCP_CLOSE) {
416 sk->sk_err = ECONNRESET;
417 chtls_send_reset(sk, CPL_ABORT_SEND_RST, NULL);
418 err = wait_for_states(sk, TCPF_CLOSE);
419 if (err)
420 return err;
421 }
422 chtls_purge_recv_queue(sk);
423 chtls_purge_receive_queue(sk);
424 tp->max_window = 0xFFFF << (tp->rx_opt.snd_wscale);
425 return tcp_disconnect(sk, flags);
426 }
427
428 #define SHUTDOWN_ELIGIBLE_STATE (TCPF_ESTABLISHED | \
429 TCPF_SYN_RECV | TCPF_CLOSE_WAIT)
430 void chtls_shutdown(struct sock *sk, int how)
431 {
432 if ((how & SEND_SHUTDOWN) &&
433 sk_in_state(sk, SHUTDOWN_ELIGIBLE_STATE) &&
434 make_close_transition(sk))
435 chtls_close_conn(sk);
436 }
437
438 void chtls_destroy_sock(struct sock *sk)
439 {
440 struct chtls_sock *csk;
441
442 csk = rcu_dereference_sk_user_data(sk);
443 chtls_purge_recv_queue(sk);
444 csk->ulp_mode = ULP_MODE_NONE;
445 chtls_purge_write_queue(sk);
446 free_tls_keyid(sk);
447 kref_put(&csk->kref, chtls_sock_release);
448 sk->sk_prot = &tcp_prot;
449 sk->sk_prot->destroy(sk);
450 }
451
452 static void reset_listen_child(struct sock *child)
453 {
454 struct chtls_sock *csk = rcu_dereference_sk_user_data(child);
455 struct sk_buff *skb;
456
457 skb = alloc_ctrl_skb(csk->txdata_skb_cache,
458 sizeof(struct cpl_abort_req));
459
460 chtls_send_reset(child, CPL_ABORT_SEND_RST, skb);
461 sock_orphan(child);
462 INC_ORPHAN_COUNT(child);
463 if (child->sk_state == TCP_CLOSE)
464 inet_csk_destroy_sock(child);
465 }
466
467 static void chtls_disconnect_acceptq(struct sock *listen_sk)
468 {
469 struct request_sock **pprev;
470
471 pprev = ACCEPT_QUEUE(listen_sk);
472 while (*pprev) {
473 struct request_sock *req = *pprev;
474
475 if (req->rsk_ops == &chtls_rsk_ops) {
476 struct sock *child = req->sk;
477
478 *pprev = req->dl_next;
479 sk_acceptq_removed(listen_sk);
480 reqsk_put(req);
481 sock_hold(child);
482 local_bh_disable();
483 bh_lock_sock(child);
484 release_tcp_port(child);
485 reset_listen_child(child);
486 bh_unlock_sock(child);
487 local_bh_enable();
488 sock_put(child);
489 } else {
490 pprev = &req->dl_next;
491 }
492 }
493 }
494
495 static int listen_hashfn(const struct sock *sk)
496 {
497 return ((unsigned long)sk >> 10) & (LISTEN_INFO_HASH_SIZE - 1);
498 }
499
500 static struct listen_info *listen_hash_add(struct chtls_dev *cdev,
501 struct sock *sk,
502 unsigned int stid)
503 {
504 struct listen_info *p = kmalloc(sizeof(*p), GFP_KERNEL);
505
506 if (p) {
507 int key = listen_hashfn(sk);
508
509 p->sk = sk;
510 p->stid = stid;
511 spin_lock(&cdev->listen_lock);
512 p->next = cdev->listen_hash_tab[key];
513 cdev->listen_hash_tab[key] = p;
514 spin_unlock(&cdev->listen_lock);
515 }
516 return p;
517 }
518
519 static int listen_hash_find(struct chtls_dev *cdev,
520 struct sock *sk)
521 {
522 struct listen_info *p;
523 int stid = -1;
524 int key;
525
526 key = listen_hashfn(sk);
527
528 spin_lock(&cdev->listen_lock);
529 for (p = cdev->listen_hash_tab[key]; p; p = p->next)
530 if (p->sk == sk) {
531 stid = p->stid;
532 break;
533 }
534 spin_unlock(&cdev->listen_lock);
535 return stid;
536 }
537
538 static int listen_hash_del(struct chtls_dev *cdev,
539 struct sock *sk)
540 {
541 struct listen_info *p, **prev;
542 int stid = -1;
543 int key;
544
545 key = listen_hashfn(sk);
546 prev = &cdev->listen_hash_tab[key];
547
548 spin_lock(&cdev->listen_lock);
549 for (p = *prev; p; prev = &p->next, p = p->next)
550 if (p->sk == sk) {
551 stid = p->stid;
552 *prev = p->next;
553 kfree(p);
554 break;
555 }
556 spin_unlock(&cdev->listen_lock);
557 return stid;
558 }
559
560 static void cleanup_syn_rcv_conn(struct sock *child, struct sock *parent)
561 {
562 struct request_sock *req;
563 struct chtls_sock *csk;
564
565 csk = rcu_dereference_sk_user_data(child);
566 req = csk->passive_reap_next;
567
568 reqsk_queue_removed(&inet_csk(parent)->icsk_accept_queue, req);
569 __skb_unlink((struct sk_buff *)&csk->synq, &csk->listen_ctx->synq);
570 chtls_reqsk_free(req);
571 csk->passive_reap_next = NULL;
572 }
573
574 static void chtls_reset_synq(struct listen_ctx *listen_ctx)
575 {
576 struct sock *listen_sk = listen_ctx->lsk;
577
578 while (!skb_queue_empty(&listen_ctx->synq)) {
579 struct chtls_sock *csk =
580 container_of((struct synq *)__skb_dequeue
581 (&listen_ctx->synq), struct chtls_sock, synq);
582 struct sock *child = csk->sk;
583
584 cleanup_syn_rcv_conn(child, listen_sk);
585 sock_hold(child);
586 local_bh_disable();
587 bh_lock_sock(child);
588 release_tcp_port(child);
589 reset_listen_child(child);
590 bh_unlock_sock(child);
591 local_bh_enable();
592 sock_put(child);
593 }
594 }
595
596 int chtls_listen_start(struct chtls_dev *cdev, struct sock *sk)
597 {
598 struct net_device *ndev;
599 struct listen_ctx *ctx;
600 struct adapter *adap;
601 struct port_info *pi;
602 int stid;
603 int ret;
604
605 if (sk->sk_family != PF_INET)
606 return -EAGAIN;
607
608 rcu_read_lock();
609 ndev = chtls_ipv4_netdev(cdev, sk);
610 rcu_read_unlock();
611 if (!ndev)
612 return -EBADF;
613
614 pi = netdev_priv(ndev);
615 adap = pi->adapter;
616 if (!(adap->flags & CXGB4_FULL_INIT_DONE))
617 return -EBADF;
618
619 if (listen_hash_find(cdev, sk) >= 0) /* already have it */
620 return -EADDRINUSE;
621
622 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
623 if (!ctx)
624 return -ENOMEM;
625
626 __module_get(THIS_MODULE);
627 ctx->lsk = sk;
628 ctx->cdev = cdev;
629 ctx->state = T4_LISTEN_START_PENDING;
630 skb_queue_head_init(&ctx->synq);
631
632 stid = cxgb4_alloc_stid(cdev->tids, sk->sk_family, ctx);
633 if (stid < 0)
634 goto free_ctx;
635
636 sock_hold(sk);
637 if (!listen_hash_add(cdev, sk, stid))
638 goto free_stid;
639
640 ret = cxgb4_create_server(ndev, stid,
641 inet_sk(sk)->inet_rcv_saddr,
642 inet_sk(sk)->inet_sport, 0,
643 cdev->lldi->rxq_ids[0]);
644 if (ret > 0)
645 ret = net_xmit_errno(ret);
646 if (ret)
647 goto del_hash;
648 return 0;
649 del_hash:
650 listen_hash_del(cdev, sk);
651 free_stid:
652 cxgb4_free_stid(cdev->tids, stid, sk->sk_family);
653 sock_put(sk);
654 free_ctx:
655 kfree(ctx);
656 module_put(THIS_MODULE);
657 return -EBADF;
658 }
659
660 void chtls_listen_stop(struct chtls_dev *cdev, struct sock *sk)
661 {
662 struct listen_ctx *listen_ctx;
663 int stid;
664
665 stid = listen_hash_del(cdev, sk);
666 if (stid < 0)
667 return;
668
669 listen_ctx = (struct listen_ctx *)lookup_stid(cdev->tids, stid);
670 chtls_reset_synq(listen_ctx);
671
672 cxgb4_remove_server(cdev->lldi->ports[0], stid,
673 cdev->lldi->rxq_ids[0], 0);
674 chtls_disconnect_acceptq(sk);
675 }
676
677 static int chtls_pass_open_rpl(struct chtls_dev *cdev, struct sk_buff *skb)
678 {
679 struct cpl_pass_open_rpl *rpl = cplhdr(skb) + RSS_HDR;
680 unsigned int stid = GET_TID(rpl);
681 struct listen_ctx *listen_ctx;
682
683 listen_ctx = (struct listen_ctx *)lookup_stid(cdev->tids, stid);
684 if (!listen_ctx)
685 return CPL_RET_BUF_DONE;
686
687 if (listen_ctx->state == T4_LISTEN_START_PENDING) {
688 listen_ctx->state = T4_LISTEN_STARTED;
689 return CPL_RET_BUF_DONE;
690 }
691
692 if (rpl->status != CPL_ERR_NONE) {
693 pr_info("Unexpected PASS_OPEN_RPL status %u for STID %u\n",
694 rpl->status, stid);
695 return CPL_RET_BUF_DONE;
696 }
697 cxgb4_free_stid(cdev->tids, stid, listen_ctx->lsk->sk_family);
698 sock_put(listen_ctx->lsk);
699 kfree(listen_ctx);
700 module_put(THIS_MODULE);
701
702 return 0;
703 }
704
705 static int chtls_close_listsrv_rpl(struct chtls_dev *cdev, struct sk_buff *skb)
706 {
707 struct cpl_close_listsvr_rpl *rpl = cplhdr(skb) + RSS_HDR;
708 struct listen_ctx *listen_ctx;
709 unsigned int stid;
710 void *data;
711
712 stid = GET_TID(rpl);
713 data = lookup_stid(cdev->tids, stid);
714 listen_ctx = (struct listen_ctx *)data;
715
716 if (rpl->status != CPL_ERR_NONE) {
717 pr_info("Unexpected CLOSE_LISTSRV_RPL status %u for STID %u\n",
718 rpl->status, stid);
719 return CPL_RET_BUF_DONE;
720 }
721
722 cxgb4_free_stid(cdev->tids, stid, listen_ctx->lsk->sk_family);
723 sock_put(listen_ctx->lsk);
724 kfree(listen_ctx);
725 module_put(THIS_MODULE);
726
727 return 0;
728 }
729
730 static void chtls_purge_wr_queue(struct sock *sk)
731 {
732 struct sk_buff *skb;
733
734 while ((skb = dequeue_wr(sk)) != NULL)
735 kfree_skb(skb);
736 }
737
738 static void chtls_release_resources(struct sock *sk)
739 {
740 struct chtls_sock *csk = rcu_dereference_sk_user_data(sk);
741 struct chtls_dev *cdev = csk->cdev;
742 unsigned int tid = csk->tid;
743 struct tid_info *tids;
744
745 if (!cdev)
746 return;
747
748 tids = cdev->tids;
749 kfree_skb(csk->txdata_skb_cache);
750 csk->txdata_skb_cache = NULL;
751
752 if (csk->wr_credits != csk->wr_max_credits) {
753 chtls_purge_wr_queue(sk);
754 chtls_reset_wr_list(csk);
755 }
756
757 if (csk->l2t_entry) {
758 cxgb4_l2t_release(csk->l2t_entry);
759 csk->l2t_entry = NULL;
760 }
761
762 cxgb4_remove_tid(tids, csk->port_id, tid, sk->sk_family);
763 sock_put(sk);
764 }
765
766 static void chtls_conn_done(struct sock *sk)
767 {
768 if (sock_flag(sk, SOCK_DEAD))
769 chtls_purge_receive_queue(sk);
770 sk_wakeup_sleepers(sk, 0);
771 tcp_done(sk);
772 }
773
774 static void do_abort_syn_rcv(struct sock *child, struct sock *parent)
775 {
776 /*
777 * If the server is still open we clean up the child connection,
778 * otherwise the server already did the clean up as it was purging
779 * its SYN queue and the skb was just sitting in its backlog.
780 */
781 if (likely(parent->sk_state == TCP_LISTEN)) {
782 cleanup_syn_rcv_conn(child, parent);
783 /* Without the below call to sock_orphan,
784 * we leak the socket resource with syn_flood test
785 * as inet_csk_destroy_sock will not be called
786 * in tcp_done since SOCK_DEAD flag is not set.
787 * Kernel handles this differently where new socket is
788 * created only after 3 way handshake is done.
789 */
790 sock_orphan(child);
791 percpu_counter_inc((child)->sk_prot->orphan_count);
792 chtls_release_resources(child);
793 chtls_conn_done(child);
794 } else {
795 if (csk_flag(child, CSK_RST_ABORTED)) {
796 chtls_release_resources(child);
797 chtls_conn_done(child);
798 }
799 }
800 }
801
802 static void pass_open_abort(struct sock *child, struct sock *parent,
803 struct sk_buff *skb)
804 {
805 do_abort_syn_rcv(child, parent);
806 kfree_skb(skb);
807 }
808
809 static void bl_pass_open_abort(struct sock *lsk, struct sk_buff *skb)
810 {
811 pass_open_abort(skb->sk, lsk, skb);
812 }
813
814 static void chtls_pass_open_arp_failure(struct sock *sk,
815 struct sk_buff *skb)
816 {
817 const struct request_sock *oreq;
818 struct chtls_sock *csk;
819 struct chtls_dev *cdev;
820 struct sock *parent;
821 void *data;
822
823 csk = rcu_dereference_sk_user_data(sk);
824 cdev = csk->cdev;
825
826 /*
827 * If the connection is being aborted due to the parent listening
828 * socket going away there's nothing to do, the ABORT_REQ will close
829 * the connection.
830 */
831 if (csk_flag(sk, CSK_ABORT_RPL_PENDING)) {
832 kfree_skb(skb);
833 return;
834 }
835
836 oreq = csk->passive_reap_next;
837 data = lookup_stid(cdev->tids, oreq->ts_recent);
838 parent = ((struct listen_ctx *)data)->lsk;
839
840 bh_lock_sock(parent);
841 if (!sock_owned_by_user(parent)) {
842 pass_open_abort(sk, parent, skb);
843 } else {
844 BLOG_SKB_CB(skb)->backlog_rcv = bl_pass_open_abort;
845 __sk_add_backlog(parent, skb);
846 }
847 bh_unlock_sock(parent);
848 }
849
850 static void chtls_accept_rpl_arp_failure(void *handle,
851 struct sk_buff *skb)
852 {
853 struct sock *sk = (struct sock *)handle;
854
855 sock_hold(sk);
856 process_cpl_msg(chtls_pass_open_arp_failure, sk, skb);
857 sock_put(sk);
858 }
859
860 static unsigned int chtls_select_mss(const struct chtls_sock *csk,
861 unsigned int pmtu,
862 struct cpl_pass_accept_req *req)
863 {
864 struct chtls_dev *cdev;
865 struct dst_entry *dst;
866 unsigned int tcpoptsz;
867 unsigned int iphdrsz;
868 unsigned int mtu_idx;
869 struct tcp_sock *tp;
870 unsigned int mss;
871 struct sock *sk;
872
873 mss = ntohs(req->tcpopt.mss);
874 sk = csk->sk;
875 dst = __sk_dst_get(sk);
876 cdev = csk->cdev;
877 tp = tcp_sk(sk);
878 tcpoptsz = 0;
879
880 iphdrsz = sizeof(struct iphdr) + sizeof(struct tcphdr);
881 if (req->tcpopt.tstamp)
882 tcpoptsz += round_up(TCPOLEN_TIMESTAMP, 4);
883
884 tp->advmss = dst_metric_advmss(dst);
885 if (USER_MSS(tp) && tp->advmss > USER_MSS(tp))
886 tp->advmss = USER_MSS(tp);
887 if (tp->advmss > pmtu - iphdrsz)
888 tp->advmss = pmtu - iphdrsz;
889 if (mss && tp->advmss > mss)
890 tp->advmss = mss;
891
892 tp->advmss = cxgb4_best_aligned_mtu(cdev->lldi->mtus,
893 iphdrsz + tcpoptsz,
894 tp->advmss - tcpoptsz,
895 8, &mtu_idx);
896 tp->advmss -= iphdrsz;
897
898 inet_csk(sk)->icsk_pmtu_cookie = pmtu;
899 return mtu_idx;
900 }
901
902 static unsigned int select_rcv_wscale(int space, int wscale_ok, int win_clamp)
903 {
904 int wscale = 0;
905
906 if (space > MAX_RCV_WND)
907 space = MAX_RCV_WND;
908 if (win_clamp && win_clamp < space)
909 space = win_clamp;
910
911 if (wscale_ok) {
912 while (wscale < 14 && (65535 << wscale) < space)
913 wscale++;
914 }
915 return wscale;
916 }
917
918 static void chtls_pass_accept_rpl(struct sk_buff *skb,
919 struct cpl_pass_accept_req *req,
920 unsigned int tid)
921
922 {
923 struct cpl_t5_pass_accept_rpl *rpl5;
924 struct cxgb4_lld_info *lldi;
925 const struct tcphdr *tcph;
926 const struct tcp_sock *tp;
927 struct chtls_sock *csk;
928 unsigned int len;
929 struct sock *sk;
930 u32 opt2, hlen;
931 u64 opt0;
932
933 sk = skb->sk;
934 tp = tcp_sk(sk);
935 csk = sk->sk_user_data;
936 csk->tid = tid;
937 lldi = csk->cdev->lldi;
938 len = roundup(sizeof(*rpl5), 16);
939
940 rpl5 = __skb_put_zero(skb, len);
941 INIT_TP_WR(rpl5, tid);
942
943 OPCODE_TID(rpl5) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
944 csk->tid));
945 csk->mtu_idx = chtls_select_mss(csk, dst_mtu(__sk_dst_get(sk)),
946 req);
947 opt0 = TCAM_BYPASS_F |
948 WND_SCALE_V(RCV_WSCALE(tp)) |
949 MSS_IDX_V(csk->mtu_idx) |
950 L2T_IDX_V(csk->l2t_entry->idx) |
951 NAGLE_V(!(tp->nonagle & TCP_NAGLE_OFF)) |
952 TX_CHAN_V(csk->tx_chan) |
953 SMAC_SEL_V(csk->smac_idx) |
954 DSCP_V(csk->tos >> 2) |
955 ULP_MODE_V(ULP_MODE_TLS) |
956 RCV_BUFSIZ_V(min(tp->rcv_wnd >> 10, RCV_BUFSIZ_M));
957
958 opt2 = RX_CHANNEL_V(0) |
959 RSS_QUEUE_VALID_F | RSS_QUEUE_V(csk->rss_qid);
960
961 if (!is_t5(lldi->adapter_type))
962 opt2 |= RX_FC_DISABLE_F;
963 if (req->tcpopt.tstamp)
964 opt2 |= TSTAMPS_EN_F;
965 if (req->tcpopt.sack)
966 opt2 |= SACK_EN_F;
967 hlen = ntohl(req->hdr_len);
968
969 tcph = (struct tcphdr *)((u8 *)(req + 1) +
970 T6_ETH_HDR_LEN_G(hlen) + T6_IP_HDR_LEN_G(hlen));
971 if (tcph->ece && tcph->cwr)
972 opt2 |= CCTRL_ECN_V(1);
973 opt2 |= CONG_CNTRL_V(CONG_ALG_NEWRENO);
974 opt2 |= T5_ISS_F;
975 opt2 |= T5_OPT_2_VALID_F;
976 rpl5->opt0 = cpu_to_be64(opt0);
977 rpl5->opt2 = cpu_to_be32(opt2);
978 rpl5->iss = cpu_to_be32((prandom_u32() & ~7UL) - 1);
979 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
980 t4_set_arp_err_handler(skb, sk, chtls_accept_rpl_arp_failure);
981 cxgb4_l2t_send(csk->egress_dev, skb, csk->l2t_entry);
982 }
983
984 static void inet_inherit_port(struct inet_hashinfo *hash_info,
985 struct sock *lsk, struct sock *newsk)
986 {
987 local_bh_disable();
988 __inet_inherit_port(lsk, newsk);
989 local_bh_enable();
990 }
991
992 static int chtls_backlog_rcv(struct sock *sk, struct sk_buff *skb)
993 {
994 if (skb->protocol) {
995 kfree_skb(skb);
996 return 0;
997 }
998 BLOG_SKB_CB(skb)->backlog_rcv(sk, skb);
999 return 0;
1000 }
1001
1002 static void chtls_set_tcp_window(struct chtls_sock *csk)
1003 {
1004 struct net_device *ndev = csk->egress_dev;
1005 struct port_info *pi = netdev_priv(ndev);
1006 unsigned int linkspeed;
1007 u8 scale;
1008
1009 linkspeed = pi->link_cfg.speed;
1010 scale = linkspeed / SPEED_10000;
1011 #define CHTLS_10G_RCVWIN (256 * 1024)
1012 csk->rcv_win = CHTLS_10G_RCVWIN;
1013 if (scale)
1014 csk->rcv_win *= scale;
1015 #define CHTLS_10G_SNDWIN (256 * 1024)
1016 csk->snd_win = CHTLS_10G_SNDWIN;
1017 if (scale)
1018 csk->snd_win *= scale;
1019 }
1020
1021 static struct sock *chtls_recv_sock(struct sock *lsk,
1022 struct request_sock *oreq,
1023 void *network_hdr,
1024 const struct cpl_pass_accept_req *req,
1025 struct chtls_dev *cdev)
1026 {
1027 struct inet_sock *newinet;
1028 const struct iphdr *iph;
1029 struct tls_context *ctx;
1030 struct net_device *ndev;
1031 struct chtls_sock *csk;
1032 struct dst_entry *dst;
1033 struct neighbour *n;
1034 struct tcp_sock *tp;
1035 struct sock *newsk;
1036 u16 port_id;
1037 int rxq_idx;
1038 int step;
1039
1040 iph = (const struct iphdr *)network_hdr;
1041 newsk = tcp_create_openreq_child(lsk, oreq, cdev->askb);
1042 if (!newsk)
1043 goto free_oreq;
1044
1045 dst = inet_csk_route_child_sock(lsk, newsk, oreq);
1046 if (!dst)
1047 goto free_sk;
1048
1049 n = dst_neigh_lookup(dst, &iph->saddr);
1050 if (!n)
1051 goto free_sk;
1052
1053 ndev = n->dev;
1054 if (!ndev)
1055 goto free_dst;
1056 port_id = cxgb4_port_idx(ndev);
1057
1058 csk = chtls_sock_create(cdev);
1059 if (!csk)
1060 goto free_dst;
1061
1062 csk->l2t_entry = cxgb4_l2t_get(cdev->lldi->l2t, n, ndev, 0);
1063 if (!csk->l2t_entry)
1064 goto free_csk;
1065
1066 newsk->sk_user_data = csk;
1067 newsk->sk_backlog_rcv = chtls_backlog_rcv;
1068
1069 tp = tcp_sk(newsk);
1070 newinet = inet_sk(newsk);
1071
1072 newinet->inet_daddr = iph->saddr;
1073 newinet->inet_rcv_saddr = iph->daddr;
1074 newinet->inet_saddr = iph->daddr;
1075
1076 oreq->ts_recent = PASS_OPEN_TID_G(ntohl(req->tos_stid));
1077 sk_setup_caps(newsk, dst);
1078 ctx = tls_get_ctx(lsk);
1079 newsk->sk_destruct = ctx->sk_destruct;
1080 csk->sk = newsk;
1081 csk->passive_reap_next = oreq;
1082 csk->tx_chan = cxgb4_port_chan(ndev);
1083 csk->port_id = port_id;
1084 csk->egress_dev = ndev;
1085 csk->tos = PASS_OPEN_TOS_G(ntohl(req->tos_stid));
1086 chtls_set_tcp_window(csk);
1087 tp->rcv_wnd = csk->rcv_win;
1088 csk->sndbuf = csk->snd_win;
1089 csk->ulp_mode = ULP_MODE_TLS;
1090 step = cdev->lldi->nrxq / cdev->lldi->nchan;
1091 csk->rss_qid = cdev->lldi->rxq_ids[port_id * step];
1092 rxq_idx = port_id * step;
1093 csk->txq_idx = (rxq_idx < cdev->lldi->ntxq) ? rxq_idx :
1094 port_id * step;
1095 csk->sndbuf = newsk->sk_sndbuf;
1096 csk->smac_idx = ((struct port_info *)netdev_priv(ndev))->smt_idx;
1097 RCV_WSCALE(tp) = select_rcv_wscale(tcp_full_space(newsk),
1098 sock_net(newsk)->
1099 ipv4.sysctl_tcp_window_scaling,
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 vlan_ethhdr *vlan_eh;
1152 struct request_sock *oreq;
1153 struct sk_buff *reply_skb;
1154 struct chtls_sock *csk;
1155 struct chtls_dev *cdev;
1156 struct tcphdr *tcph;
1157 struct sock *newsk;
1158 struct ethhdr *eh;
1159 struct iphdr *iph;
1160 void *network_hdr;
1161 unsigned int stid;
1162 unsigned int len;
1163 unsigned int tid;
1164 bool th_ecn, ect;
1165 __u8 ip_dsfield; /* IPv4 tos or IPv6 dsfield */
1166 u16 eth_hdr_len;
1167 bool ecn_ok;
1168
1169 req = cplhdr(skb) + RSS_HDR;
1170 tid = GET_TID(req);
1171 cdev = BLOG_SKB_CB(skb)->cdev;
1172 newsk = lookup_tid(cdev->tids, tid);
1173 stid = PASS_OPEN_TID_G(ntohl(req->tos_stid));
1174 if (newsk) {
1175 pr_info("tid (%d) already in use\n", tid);
1176 return;
1177 }
1178
1179 len = roundup(sizeof(*rpl), 16);
1180 reply_skb = alloc_skb(len, GFP_ATOMIC);
1181 if (!reply_skb) {
1182 cxgb4_remove_tid(cdev->tids, 0, tid, sk->sk_family);
1183 kfree_skb(skb);
1184 return;
1185 }
1186
1187 if (sk->sk_state != TCP_LISTEN)
1188 goto reject;
1189
1190 if (inet_csk_reqsk_queue_is_full(sk))
1191 goto reject;
1192
1193 if (sk_acceptq_is_full(sk))
1194 goto reject;
1195
1196 oreq = inet_reqsk_alloc(&chtls_rsk_ops, sk, true);
1197 if (!oreq)
1198 goto reject;
1199
1200 oreq->rsk_rcv_wnd = 0;
1201 oreq->rsk_window_clamp = 0;
1202 oreq->cookie_ts = 0;
1203 oreq->mss = 0;
1204 oreq->ts_recent = 0;
1205
1206 eth_hdr_len = T6_ETH_HDR_LEN_G(ntohl(req->hdr_len));
1207 if (eth_hdr_len == ETH_HLEN) {
1208 eh = (struct ethhdr *)(req + 1);
1209 iph = (struct iphdr *)(eh + 1);
1210 network_hdr = (void *)(eh + 1);
1211 } else {
1212 vlan_eh = (struct vlan_ethhdr *)(req + 1);
1213 iph = (struct iphdr *)(vlan_eh + 1);
1214 network_hdr = (void *)(vlan_eh + 1);
1215 }
1216 if (iph->version != 0x4)
1217 goto free_oreq;
1218
1219 tcph = (struct tcphdr *)(iph + 1);
1220 skb_set_network_header(skb, (void *)iph - (void *)req);
1221
1222 tcp_rsk(oreq)->tfo_listener = false;
1223 tcp_rsk(oreq)->rcv_isn = ntohl(tcph->seq);
1224 chtls_set_req_port(oreq, tcph->source, tcph->dest);
1225 chtls_set_req_addr(oreq, iph->daddr, iph->saddr);
1226 ip_dsfield = ipv4_get_dsfield(iph);
1227 if (req->tcpopt.wsf <= 14 &&
1228 sock_net(sk)->ipv4.sysctl_tcp_window_scaling) {
1229 inet_rsk(oreq)->wscale_ok = 1;
1230 inet_rsk(oreq)->snd_wscale = req->tcpopt.wsf;
1231 }
1232 inet_rsk(oreq)->ir_iif = sk->sk_bound_dev_if;
1233 th_ecn = tcph->ece && tcph->cwr;
1234 if (th_ecn) {
1235 ect = !INET_ECN_is_not_ect(ip_dsfield);
1236 ecn_ok = sock_net(sk)->ipv4.sysctl_tcp_ecn;
1237 if ((!ect && ecn_ok) || tcp_ca_needs_ecn(sk))
1238 inet_rsk(oreq)->ecn_ok = 1;
1239 }
1240
1241 newsk = chtls_recv_sock(sk, oreq, network_hdr, req, cdev);
1242 if (!newsk)
1243 goto reject;
1244
1245 if (chtls_get_module(newsk))
1246 goto reject;
1247 inet_csk_reqsk_queue_added(sk);
1248 reply_skb->sk = newsk;
1249 chtls_install_cpl_ops(newsk);
1250 cxgb4_insert_tid(cdev->tids, newsk, tid, newsk->sk_family);
1251 csk = rcu_dereference_sk_user_data(newsk);
1252 listen_ctx = (struct listen_ctx *)lookup_stid(cdev->tids, stid);
1253 csk->listen_ctx = listen_ctx;
1254 __skb_queue_tail(&listen_ctx->synq, (struct sk_buff *)&csk->synq);
1255 chtls_pass_accept_rpl(reply_skb, req, tid);
1256 kfree_skb(skb);
1257 return;
1258
1259 free_oreq:
1260 chtls_reqsk_free(oreq);
1261 reject:
1262 mk_tid_release(reply_skb, 0, tid);
1263 cxgb4_ofld_send(cdev->lldi->ports[0], reply_skb);
1264 kfree_skb(skb);
1265 }
1266
1267 /*
1268 * Handle a CPL_PASS_ACCEPT_REQ message.
1269 */
1270 static int chtls_pass_accept_req(struct chtls_dev *cdev, struct sk_buff *skb)
1271 {
1272 struct cpl_pass_accept_req *req = cplhdr(skb) + RSS_HDR;
1273 struct listen_ctx *ctx;
1274 unsigned int stid;
1275 unsigned int tid;
1276 struct sock *lsk;
1277 void *data;
1278
1279 stid = PASS_OPEN_TID_G(ntohl(req->tos_stid));
1280 tid = GET_TID(req);
1281
1282 data = lookup_stid(cdev->tids, stid);
1283 if (!data)
1284 return 1;
1285
1286 ctx = (struct listen_ctx *)data;
1287 lsk = ctx->lsk;
1288
1289 if (unlikely(tid_out_of_range(cdev->tids, tid))) {
1290 pr_info("passive open TID %u too large\n", tid);
1291 return 1;
1292 }
1293
1294 BLOG_SKB_CB(skb)->cdev = cdev;
1295 process_cpl_msg(chtls_pass_accept_request, lsk, skb);
1296 return 0;
1297 }
1298
1299 /*
1300 * Completes some final bits of initialization for just established connections
1301 * and changes their state to TCP_ESTABLISHED.
1302 *
1303 * snd_isn here is the ISN after the SYN, i.e., the true ISN + 1.
1304 */
1305 static void make_established(struct sock *sk, u32 snd_isn, unsigned int opt)
1306 {
1307 struct tcp_sock *tp = tcp_sk(sk);
1308
1309 tp->pushed_seq = snd_isn;
1310 tp->write_seq = snd_isn;
1311 tp->snd_nxt = snd_isn;
1312 tp->snd_una = snd_isn;
1313 inet_sk(sk)->inet_id = prandom_u32();
1314 assign_rxopt(sk, opt);
1315
1316 if (tp->rcv_wnd > (RCV_BUFSIZ_M << 10))
1317 tp->rcv_wup -= tp->rcv_wnd - (RCV_BUFSIZ_M << 10);
1318
1319 smp_mb();
1320 tcp_set_state(sk, TCP_ESTABLISHED);
1321 }
1322
1323 static void chtls_abort_conn(struct sock *sk, struct sk_buff *skb)
1324 {
1325 struct sk_buff *abort_skb;
1326
1327 abort_skb = alloc_skb(sizeof(struct cpl_abort_req), GFP_ATOMIC);
1328 if (abort_skb)
1329 chtls_send_reset(sk, CPL_ABORT_SEND_RST, abort_skb);
1330 }
1331
1332 static struct sock *reap_list;
1333 static DEFINE_SPINLOCK(reap_list_lock);
1334
1335 /*
1336 * Process the reap list.
1337 */
1338 DECLARE_TASK_FUNC(process_reap_list, task_param)
1339 {
1340 spin_lock_bh(&reap_list_lock);
1341 while (reap_list) {
1342 struct sock *sk = reap_list;
1343 struct chtls_sock *csk = rcu_dereference_sk_user_data(sk);
1344
1345 reap_list = csk->passive_reap_next;
1346 csk->passive_reap_next = NULL;
1347 spin_unlock(&reap_list_lock);
1348 sock_hold(sk);
1349
1350 bh_lock_sock(sk);
1351 chtls_abort_conn(sk, NULL);
1352 sock_orphan(sk);
1353 if (sk->sk_state == TCP_CLOSE)
1354 inet_csk_destroy_sock(sk);
1355 bh_unlock_sock(sk);
1356 sock_put(sk);
1357 spin_lock(&reap_list_lock);
1358 }
1359 spin_unlock_bh(&reap_list_lock);
1360 }
1361
1362 static DECLARE_WORK(reap_task, process_reap_list);
1363
1364 static void add_to_reap_list(struct sock *sk)
1365 {
1366 struct chtls_sock *csk = sk->sk_user_data;
1367
1368 local_bh_disable();
1369 bh_lock_sock(sk);
1370 release_tcp_port(sk); /* release the port immediately */
1371
1372 spin_lock(&reap_list_lock);
1373 csk->passive_reap_next = reap_list;
1374 reap_list = sk;
1375 if (!csk->passive_reap_next)
1376 schedule_work(&reap_task);
1377 spin_unlock(&reap_list_lock);
1378 bh_unlock_sock(sk);
1379 local_bh_enable();
1380 }
1381
1382 static void add_pass_open_to_parent(struct sock *child, struct sock *lsk,
1383 struct chtls_dev *cdev)
1384 {
1385 struct request_sock *oreq;
1386 struct chtls_sock *csk;
1387
1388 if (lsk->sk_state != TCP_LISTEN)
1389 return;
1390
1391 csk = child->sk_user_data;
1392 oreq = csk->passive_reap_next;
1393 csk->passive_reap_next = NULL;
1394
1395 reqsk_queue_removed(&inet_csk(lsk)->icsk_accept_queue, oreq);
1396 __skb_unlink((struct sk_buff *)&csk->synq, &csk->listen_ctx->synq);
1397
1398 if (sk_acceptq_is_full(lsk)) {
1399 chtls_reqsk_free(oreq);
1400 add_to_reap_list(child);
1401 } else {
1402 refcount_set(&oreq->rsk_refcnt, 1);
1403 inet_csk_reqsk_queue_add(lsk, oreq, child);
1404 lsk->sk_data_ready(lsk);
1405 }
1406 }
1407
1408 static void bl_add_pass_open_to_parent(struct sock *lsk, struct sk_buff *skb)
1409 {
1410 struct sock *child = skb->sk;
1411
1412 skb->sk = NULL;
1413 add_pass_open_to_parent(child, lsk, BLOG_SKB_CB(skb)->cdev);
1414 kfree_skb(skb);
1415 }
1416
1417 static int chtls_pass_establish(struct chtls_dev *cdev, struct sk_buff *skb)
1418 {
1419 struct cpl_pass_establish *req = cplhdr(skb) + RSS_HDR;
1420 struct chtls_sock *csk;
1421 struct sock *lsk, *sk;
1422 unsigned int hwtid;
1423
1424 hwtid = GET_TID(req);
1425 sk = lookup_tid(cdev->tids, hwtid);
1426 if (!sk)
1427 return (CPL_RET_UNKNOWN_TID | CPL_RET_BUF_DONE);
1428
1429 bh_lock_sock(sk);
1430 if (unlikely(sock_owned_by_user(sk))) {
1431 kfree_skb(skb);
1432 } else {
1433 unsigned int stid;
1434 void *data;
1435
1436 csk = sk->sk_user_data;
1437 csk->wr_max_credits = 64;
1438 csk->wr_credits = 64;
1439 csk->wr_unacked = 0;
1440 make_established(sk, ntohl(req->snd_isn), ntohs(req->tcp_opt));
1441 stid = PASS_OPEN_TID_G(ntohl(req->tos_stid));
1442 sk->sk_state_change(sk);
1443 if (unlikely(sk->sk_socket))
1444 sk_wake_async(sk, 0, POLL_OUT);
1445
1446 data = lookup_stid(cdev->tids, stid);
1447 lsk = ((struct listen_ctx *)data)->lsk;
1448
1449 bh_lock_sock(lsk);
1450 if (unlikely(skb_queue_empty(&csk->listen_ctx->synq))) {
1451 /* removed from synq */
1452 bh_unlock_sock(lsk);
1453 kfree_skb(skb);
1454 goto unlock;
1455 }
1456
1457 if (likely(!sock_owned_by_user(lsk))) {
1458 kfree_skb(skb);
1459 add_pass_open_to_parent(sk, lsk, cdev);
1460 } else {
1461 skb->sk = sk;
1462 BLOG_SKB_CB(skb)->cdev = cdev;
1463 BLOG_SKB_CB(skb)->backlog_rcv =
1464 bl_add_pass_open_to_parent;
1465 __sk_add_backlog(lsk, skb);
1466 }
1467 bh_unlock_sock(lsk);
1468 }
1469 unlock:
1470 bh_unlock_sock(sk);
1471 return 0;
1472 }
1473
1474 /*
1475 * Handle receipt of an urgent pointer.
1476 */
1477 static void handle_urg_ptr(struct sock *sk, u32 urg_seq)
1478 {
1479 struct tcp_sock *tp = tcp_sk(sk);
1480
1481 urg_seq--;
1482 if (tp->urg_data && !after(urg_seq, tp->urg_seq))
1483 return; /* duplicate pointer */
1484
1485 sk_send_sigurg(sk);
1486 if (tp->urg_seq == tp->copied_seq && tp->urg_data &&
1487 !sock_flag(sk, SOCK_URGINLINE) &&
1488 tp->copied_seq != tp->rcv_nxt) {
1489 struct sk_buff *skb = skb_peek(&sk->sk_receive_queue);
1490
1491 tp->copied_seq++;
1492 if (skb && tp->copied_seq - ULP_SKB_CB(skb)->seq >= skb->len)
1493 chtls_free_skb(sk, skb);
1494 }
1495
1496 tp->urg_data = TCP_URG_NOTYET;
1497 tp->urg_seq = urg_seq;
1498 }
1499
1500 static void check_sk_callbacks(struct chtls_sock *csk)
1501 {
1502 struct sock *sk = csk->sk;
1503
1504 if (unlikely(sk->sk_user_data &&
1505 !csk_flag_nochk(csk, CSK_CALLBACKS_CHKD)))
1506 csk_set_flag(csk, CSK_CALLBACKS_CHKD);
1507 }
1508
1509 /*
1510 * Handles Rx data that arrives in a state where the socket isn't accepting
1511 * new data.
1512 */
1513 static void handle_excess_rx(struct sock *sk, struct sk_buff *skb)
1514 {
1515 if (!csk_flag(sk, CSK_ABORT_SHUTDOWN))
1516 chtls_abort_conn(sk, skb);
1517
1518 kfree_skb(skb);
1519 }
1520
1521 static void chtls_recv_data(struct sock *sk, struct sk_buff *skb)
1522 {
1523 struct cpl_rx_data *hdr = cplhdr(skb) + RSS_HDR;
1524 struct chtls_sock *csk;
1525 struct tcp_sock *tp;
1526
1527 csk = rcu_dereference_sk_user_data(sk);
1528 tp = tcp_sk(sk);
1529
1530 if (unlikely(sk->sk_shutdown & RCV_SHUTDOWN)) {
1531 handle_excess_rx(sk, skb);
1532 return;
1533 }
1534
1535 ULP_SKB_CB(skb)->seq = ntohl(hdr->seq);
1536 ULP_SKB_CB(skb)->psh = hdr->psh;
1537 skb_ulp_mode(skb) = ULP_MODE_NONE;
1538
1539 skb_reset_transport_header(skb);
1540 __skb_pull(skb, sizeof(*hdr) + RSS_HDR);
1541 if (!skb->data_len)
1542 __skb_trim(skb, ntohs(hdr->len));
1543
1544 if (unlikely(hdr->urg))
1545 handle_urg_ptr(sk, tp->rcv_nxt + ntohs(hdr->urg));
1546 if (unlikely(tp->urg_data == TCP_URG_NOTYET &&
1547 tp->urg_seq - tp->rcv_nxt < skb->len))
1548 tp->urg_data = TCP_URG_VALID |
1549 skb->data[tp->urg_seq - tp->rcv_nxt];
1550
1551 if (unlikely(hdr->dack_mode != csk->delack_mode)) {
1552 csk->delack_mode = hdr->dack_mode;
1553 csk->delack_seq = tp->rcv_nxt;
1554 }
1555
1556 tcp_hdr(skb)->fin = 0;
1557 tp->rcv_nxt += skb->len;
1558
1559 __skb_queue_tail(&sk->sk_receive_queue, skb);
1560
1561 if (!sock_flag(sk, SOCK_DEAD)) {
1562 check_sk_callbacks(csk);
1563 sk->sk_data_ready(sk);
1564 }
1565 }
1566
1567 static int chtls_rx_data(struct chtls_dev *cdev, struct sk_buff *skb)
1568 {
1569 struct cpl_rx_data *req = cplhdr(skb) + RSS_HDR;
1570 unsigned int hwtid = GET_TID(req);
1571 struct sock *sk;
1572
1573 sk = lookup_tid(cdev->tids, hwtid);
1574 if (unlikely(!sk)) {
1575 pr_err("can't find conn. for hwtid %u.\n", hwtid);
1576 return -EINVAL;
1577 }
1578 skb_dst_set(skb, NULL);
1579 process_cpl_msg(chtls_recv_data, sk, skb);
1580 return 0;
1581 }
1582
1583 static void chtls_recv_pdu(struct sock *sk, struct sk_buff *skb)
1584 {
1585 struct cpl_tls_data *hdr = cplhdr(skb);
1586 struct chtls_sock *csk;
1587 struct chtls_hws *tlsk;
1588 struct tcp_sock *tp;
1589
1590 csk = rcu_dereference_sk_user_data(sk);
1591 tlsk = &csk->tlshws;
1592 tp = tcp_sk(sk);
1593
1594 if (unlikely(sk->sk_shutdown & RCV_SHUTDOWN)) {
1595 handle_excess_rx(sk, skb);
1596 return;
1597 }
1598
1599 ULP_SKB_CB(skb)->seq = ntohl(hdr->seq);
1600 ULP_SKB_CB(skb)->flags = 0;
1601 skb_ulp_mode(skb) = ULP_MODE_TLS;
1602
1603 skb_reset_transport_header(skb);
1604 __skb_pull(skb, sizeof(*hdr));
1605 if (!skb->data_len)
1606 __skb_trim(skb,
1607 CPL_TLS_DATA_LENGTH_G(ntohl(hdr->length_pkd)));
1608
1609 if (unlikely(tp->urg_data == TCP_URG_NOTYET && tp->urg_seq -
1610 tp->rcv_nxt < skb->len))
1611 tp->urg_data = TCP_URG_VALID |
1612 skb->data[tp->urg_seq - tp->rcv_nxt];
1613
1614 tcp_hdr(skb)->fin = 0;
1615 tlsk->pldlen = CPL_TLS_DATA_LENGTH_G(ntohl(hdr->length_pkd));
1616 __skb_queue_tail(&tlsk->sk_recv_queue, skb);
1617 }
1618
1619 static int chtls_rx_pdu(struct chtls_dev *cdev, struct sk_buff *skb)
1620 {
1621 struct cpl_tls_data *req = cplhdr(skb);
1622 unsigned int hwtid = GET_TID(req);
1623 struct sock *sk;
1624
1625 sk = lookup_tid(cdev->tids, hwtid);
1626 if (unlikely(!sk)) {
1627 pr_err("can't find conn. for hwtid %u.\n", hwtid);
1628 return -EINVAL;
1629 }
1630 skb_dst_set(skb, NULL);
1631 process_cpl_msg(chtls_recv_pdu, sk, skb);
1632 return 0;
1633 }
1634
1635 static void chtls_set_hdrlen(struct sk_buff *skb, unsigned int nlen)
1636 {
1637 struct tlsrx_cmp_hdr *tls_cmp_hdr = cplhdr(skb);
1638
1639 skb->hdr_len = ntohs((__force __be16)tls_cmp_hdr->length);
1640 tls_cmp_hdr->length = ntohs((__force __be16)nlen);
1641 }
1642
1643 static void chtls_rx_hdr(struct sock *sk, struct sk_buff *skb)
1644 {
1645 struct tlsrx_cmp_hdr *tls_hdr_pkt;
1646 struct cpl_rx_tls_cmp *cmp_cpl;
1647 struct sk_buff *skb_rec;
1648 struct chtls_sock *csk;
1649 struct chtls_hws *tlsk;
1650 struct tcp_sock *tp;
1651
1652 cmp_cpl = cplhdr(skb);
1653 csk = rcu_dereference_sk_user_data(sk);
1654 tlsk = &csk->tlshws;
1655 tp = tcp_sk(sk);
1656
1657 ULP_SKB_CB(skb)->seq = ntohl(cmp_cpl->seq);
1658 ULP_SKB_CB(skb)->flags = 0;
1659
1660 skb_reset_transport_header(skb);
1661 __skb_pull(skb, sizeof(*cmp_cpl));
1662 tls_hdr_pkt = (struct tlsrx_cmp_hdr *)skb->data;
1663 if (tls_hdr_pkt->res_to_mac_error & TLSRX_HDR_PKT_ERROR_M)
1664 tls_hdr_pkt->type = CONTENT_TYPE_ERROR;
1665 if (!skb->data_len)
1666 __skb_trim(skb, TLS_HEADER_LENGTH);
1667
1668 tp->rcv_nxt +=
1669 CPL_RX_TLS_CMP_PDULENGTH_G(ntohl(cmp_cpl->pdulength_length));
1670
1671 ULP_SKB_CB(skb)->flags |= ULPCB_FLAG_TLS_HDR;
1672 skb_rec = __skb_dequeue(&tlsk->sk_recv_queue);
1673 if (!skb_rec) {
1674 __skb_queue_tail(&sk->sk_receive_queue, skb);
1675 } else {
1676 chtls_set_hdrlen(skb, tlsk->pldlen);
1677 tlsk->pldlen = 0;
1678 __skb_queue_tail(&sk->sk_receive_queue, skb);
1679 __skb_queue_tail(&sk->sk_receive_queue, skb_rec);
1680 }
1681
1682 if (!sock_flag(sk, SOCK_DEAD)) {
1683 check_sk_callbacks(csk);
1684 sk->sk_data_ready(sk);
1685 }
1686 }
1687
1688 static int chtls_rx_cmp(struct chtls_dev *cdev, struct sk_buff *skb)
1689 {
1690 struct cpl_rx_tls_cmp *req = cplhdr(skb);
1691 unsigned int hwtid = GET_TID(req);
1692 struct sock *sk;
1693
1694 sk = lookup_tid(cdev->tids, hwtid);
1695 if (unlikely(!sk)) {
1696 pr_err("can't find conn. for hwtid %u.\n", hwtid);
1697 return -EINVAL;
1698 }
1699 skb_dst_set(skb, NULL);
1700 process_cpl_msg(chtls_rx_hdr, sk, skb);
1701
1702 return 0;
1703 }
1704
1705 static void chtls_timewait(struct sock *sk)
1706 {
1707 struct tcp_sock *tp = tcp_sk(sk);
1708
1709 tp->rcv_nxt++;
1710 tp->rx_opt.ts_recent_stamp = ktime_get_seconds();
1711 tp->srtt_us = 0;
1712 tcp_time_wait(sk, TCP_TIME_WAIT, 0);
1713 }
1714
1715 static void chtls_peer_close(struct sock *sk, struct sk_buff *skb)
1716 {
1717 struct chtls_sock *csk = rcu_dereference_sk_user_data(sk);
1718
1719 sk->sk_shutdown |= RCV_SHUTDOWN;
1720 sock_set_flag(sk, SOCK_DONE);
1721
1722 switch (sk->sk_state) {
1723 case TCP_SYN_RECV:
1724 case TCP_ESTABLISHED:
1725 tcp_set_state(sk, TCP_CLOSE_WAIT);
1726 break;
1727 case TCP_FIN_WAIT1:
1728 tcp_set_state(sk, TCP_CLOSING);
1729 break;
1730 case TCP_FIN_WAIT2:
1731 chtls_release_resources(sk);
1732 if (csk_flag_nochk(csk, CSK_ABORT_RPL_PENDING))
1733 chtls_conn_done(sk);
1734 else
1735 chtls_timewait(sk);
1736 break;
1737 default:
1738 pr_info("cpl_peer_close in bad state %d\n", sk->sk_state);
1739 }
1740
1741 if (!sock_flag(sk, SOCK_DEAD)) {
1742 sk->sk_state_change(sk);
1743 /* Do not send POLL_HUP for half duplex close. */
1744
1745 if ((sk->sk_shutdown & SEND_SHUTDOWN) ||
1746 sk->sk_state == TCP_CLOSE)
1747 sk_wake_async(sk, SOCK_WAKE_WAITD, POLL_HUP);
1748 else
1749 sk_wake_async(sk, SOCK_WAKE_WAITD, POLL_IN);
1750 }
1751 kfree_skb(skb);
1752 }
1753
1754 static void chtls_close_con_rpl(struct sock *sk, struct sk_buff *skb)
1755 {
1756 struct cpl_close_con_rpl *rpl = cplhdr(skb) + RSS_HDR;
1757 struct chtls_sock *csk;
1758 struct tcp_sock *tp;
1759
1760 csk = rcu_dereference_sk_user_data(sk);
1761 tp = tcp_sk(sk);
1762
1763 tp->snd_una = ntohl(rpl->snd_nxt) - 1; /* exclude FIN */
1764
1765 switch (sk->sk_state) {
1766 case TCP_CLOSING:
1767 chtls_release_resources(sk);
1768 if (csk_flag_nochk(csk, CSK_ABORT_RPL_PENDING))
1769 chtls_conn_done(sk);
1770 else
1771 chtls_timewait(sk);
1772 break;
1773 case TCP_LAST_ACK:
1774 chtls_release_resources(sk);
1775 chtls_conn_done(sk);
1776 break;
1777 case TCP_FIN_WAIT1:
1778 tcp_set_state(sk, TCP_FIN_WAIT2);
1779 sk->sk_shutdown |= SEND_SHUTDOWN;
1780
1781 if (!sock_flag(sk, SOCK_DEAD))
1782 sk->sk_state_change(sk);
1783 else if (tcp_sk(sk)->linger2 < 0 &&
1784 !csk_flag_nochk(csk, CSK_ABORT_SHUTDOWN))
1785 chtls_abort_conn(sk, skb);
1786 break;
1787 default:
1788 pr_info("close_con_rpl in bad state %d\n", sk->sk_state);
1789 }
1790 kfree_skb(skb);
1791 }
1792
1793 static struct sk_buff *get_cpl_skb(struct sk_buff *skb,
1794 size_t len, gfp_t gfp)
1795 {
1796 if (likely(!skb_is_nonlinear(skb) && !skb_cloned(skb))) {
1797 WARN_ONCE(skb->len < len, "skb alloc error");
1798 __skb_trim(skb, len);
1799 skb_get(skb);
1800 } else {
1801 skb = alloc_skb(len, gfp);
1802 if (skb)
1803 __skb_put(skb, len);
1804 }
1805 return skb;
1806 }
1807
1808 static void set_abort_rpl_wr(struct sk_buff *skb, unsigned int tid,
1809 int cmd)
1810 {
1811 struct cpl_abort_rpl *rpl = cplhdr(skb);
1812
1813 INIT_TP_WR_CPL(rpl, CPL_ABORT_RPL, tid);
1814 rpl->cmd = cmd;
1815 }
1816
1817 static void send_defer_abort_rpl(struct chtls_dev *cdev, struct sk_buff *skb)
1818 {
1819 struct cpl_abort_req_rss *req = cplhdr(skb);
1820 struct sk_buff *reply_skb;
1821
1822 reply_skb = alloc_skb(sizeof(struct cpl_abort_rpl),
1823 GFP_KERNEL | __GFP_NOFAIL);
1824 __skb_put(reply_skb, sizeof(struct cpl_abort_rpl));
1825 set_abort_rpl_wr(reply_skb, GET_TID(req),
1826 (req->status & CPL_ABORT_NO_RST));
1827 set_wr_txq(reply_skb, CPL_PRIORITY_DATA, req->status >> 1);
1828 cxgb4_ofld_send(cdev->lldi->ports[0], reply_skb);
1829 kfree_skb(skb);
1830 }
1831
1832 /*
1833 * Add an skb to the deferred skb queue for processing from process context.
1834 */
1835 static void t4_defer_reply(struct sk_buff *skb, struct chtls_dev *cdev,
1836 defer_handler_t handler)
1837 {
1838 DEFERRED_SKB_CB(skb)->handler = handler;
1839 spin_lock_bh(&cdev->deferq.lock);
1840 __skb_queue_tail(&cdev->deferq, skb);
1841 if (skb_queue_len(&cdev->deferq) == 1)
1842 schedule_work(&cdev->deferq_task);
1843 spin_unlock_bh(&cdev->deferq.lock);
1844 }
1845
1846 static void send_abort_rpl(struct sock *sk, struct sk_buff *skb,
1847 struct chtls_dev *cdev, int status, int queue)
1848 {
1849 struct cpl_abort_req_rss *req = cplhdr(skb);
1850 struct sk_buff *reply_skb;
1851 struct chtls_sock *csk;
1852
1853 csk = rcu_dereference_sk_user_data(sk);
1854
1855 reply_skb = alloc_skb(sizeof(struct cpl_abort_rpl),
1856 GFP_KERNEL);
1857
1858 if (!reply_skb) {
1859 req->status = (queue << 1);
1860 t4_defer_reply(skb, cdev, send_defer_abort_rpl);
1861 return;
1862 }
1863
1864 set_abort_rpl_wr(reply_skb, GET_TID(req), status);
1865 kfree_skb(skb);
1866
1867 set_wr_txq(reply_skb, CPL_PRIORITY_DATA, queue);
1868 if (csk_conn_inline(csk)) {
1869 struct l2t_entry *e = csk->l2t_entry;
1870
1871 if (e && sk->sk_state != TCP_SYN_RECV) {
1872 cxgb4_l2t_send(csk->egress_dev, reply_skb, e);
1873 return;
1874 }
1875 }
1876 cxgb4_ofld_send(cdev->lldi->ports[0], reply_skb);
1877 }
1878
1879 static void chtls_send_abort_rpl(struct sock *sk, struct sk_buff *skb,
1880 struct chtls_dev *cdev,
1881 int status, int queue)
1882 {
1883 struct cpl_abort_req_rss *req = cplhdr(skb) + RSS_HDR;
1884 struct sk_buff *reply_skb;
1885 struct chtls_sock *csk;
1886 unsigned int tid;
1887
1888 csk = rcu_dereference_sk_user_data(sk);
1889 tid = GET_TID(req);
1890
1891 reply_skb = get_cpl_skb(skb, sizeof(struct cpl_abort_rpl), gfp_any());
1892 if (!reply_skb) {
1893 req->status = (queue << 1) | status;
1894 t4_defer_reply(skb, cdev, send_defer_abort_rpl);
1895 return;
1896 }
1897
1898 set_abort_rpl_wr(reply_skb, tid, status);
1899 set_wr_txq(reply_skb, CPL_PRIORITY_DATA, queue);
1900 if (csk_conn_inline(csk)) {
1901 struct l2t_entry *e = csk->l2t_entry;
1902
1903 if (e && sk->sk_state != TCP_SYN_RECV) {
1904 cxgb4_l2t_send(csk->egress_dev, reply_skb, e);
1905 return;
1906 }
1907 }
1908 cxgb4_ofld_send(cdev->lldi->ports[0], reply_skb);
1909 kfree_skb(skb);
1910 }
1911
1912 /*
1913 * This is run from a listener's backlog to abort a child connection in
1914 * SYN_RCV state (i.e., one on the listener's SYN queue).
1915 */
1916 static void bl_abort_syn_rcv(struct sock *lsk, struct sk_buff *skb)
1917 {
1918 struct chtls_sock *csk;
1919 struct sock *child;
1920 int queue;
1921
1922 child = skb->sk;
1923 csk = rcu_dereference_sk_user_data(child);
1924 queue = csk->txq_idx;
1925
1926 skb->sk = NULL;
1927 do_abort_syn_rcv(child, lsk);
1928 send_abort_rpl(child, skb, BLOG_SKB_CB(skb)->cdev,
1929 CPL_ABORT_NO_RST, queue);
1930 }
1931
1932 static int abort_syn_rcv(struct sock *sk, struct sk_buff *skb)
1933 {
1934 const struct request_sock *oreq;
1935 struct listen_ctx *listen_ctx;
1936 struct chtls_sock *csk;
1937 struct chtls_dev *cdev;
1938 struct sock *psk;
1939 void *ctx;
1940
1941 csk = sk->sk_user_data;
1942 oreq = csk->passive_reap_next;
1943 cdev = csk->cdev;
1944
1945 if (!oreq)
1946 return -1;
1947
1948 ctx = lookup_stid(cdev->tids, oreq->ts_recent);
1949 if (!ctx)
1950 return -1;
1951
1952 listen_ctx = (struct listen_ctx *)ctx;
1953 psk = listen_ctx->lsk;
1954
1955 bh_lock_sock(psk);
1956 if (!sock_owned_by_user(psk)) {
1957 int queue = csk->txq_idx;
1958
1959 do_abort_syn_rcv(sk, psk);
1960 send_abort_rpl(sk, skb, cdev, CPL_ABORT_NO_RST, queue);
1961 } else {
1962 skb->sk = sk;
1963 BLOG_SKB_CB(skb)->backlog_rcv = bl_abort_syn_rcv;
1964 __sk_add_backlog(psk, skb);
1965 }
1966 bh_unlock_sock(psk);
1967 return 0;
1968 }
1969
1970 static void chtls_abort_req_rss(struct sock *sk, struct sk_buff *skb)
1971 {
1972 const struct cpl_abort_req_rss *req = cplhdr(skb) + RSS_HDR;
1973 struct chtls_sock *csk = sk->sk_user_data;
1974 int rst_status = CPL_ABORT_NO_RST;
1975 int queue = csk->txq_idx;
1976
1977 if (is_neg_adv(req->status)) {
1978 if (sk->sk_state == TCP_SYN_RECV)
1979 chtls_set_tcb_tflag(sk, 0, 0);
1980
1981 kfree_skb(skb);
1982 return;
1983 }
1984
1985 csk_reset_flag(csk, CSK_ABORT_REQ_RCVD);
1986
1987 if (!csk_flag_nochk(csk, CSK_ABORT_SHUTDOWN) &&
1988 !csk_flag_nochk(csk, CSK_TX_DATA_SENT)) {
1989 struct tcp_sock *tp = tcp_sk(sk);
1990
1991 if (send_tx_flowc_wr(sk, 0, tp->snd_nxt, tp->rcv_nxt) < 0)
1992 WARN_ONCE(1, "send_tx_flowc error");
1993 csk_set_flag(csk, CSK_TX_DATA_SENT);
1994 }
1995
1996 csk_set_flag(csk, CSK_ABORT_SHUTDOWN);
1997
1998 if (!csk_flag_nochk(csk, CSK_ABORT_RPL_PENDING)) {
1999 sk->sk_err = ETIMEDOUT;
2000
2001 if (!sock_flag(sk, SOCK_DEAD))
2002 sk->sk_error_report(sk);
2003
2004 if (sk->sk_state == TCP_SYN_RECV && !abort_syn_rcv(sk, skb))
2005 return;
2006
2007 chtls_release_resources(sk);
2008 chtls_conn_done(sk);
2009 }
2010
2011 chtls_send_abort_rpl(sk, skb, csk->cdev, rst_status, queue);
2012 }
2013
2014 static void chtls_abort_rpl_rss(struct sock *sk, struct sk_buff *skb)
2015 {
2016 struct cpl_abort_rpl_rss *rpl = cplhdr(skb) + RSS_HDR;
2017 struct chtls_sock *csk;
2018 struct chtls_dev *cdev;
2019
2020 csk = rcu_dereference_sk_user_data(sk);
2021 cdev = csk->cdev;
2022
2023 if (csk_flag_nochk(csk, CSK_ABORT_RPL_PENDING)) {
2024 csk_reset_flag(csk, CSK_ABORT_RPL_PENDING);
2025 if (!csk_flag_nochk(csk, CSK_ABORT_REQ_RCVD)) {
2026 if (sk->sk_state == TCP_SYN_SENT) {
2027 cxgb4_remove_tid(cdev->tids,
2028 csk->port_id,
2029 GET_TID(rpl),
2030 sk->sk_family);
2031 sock_put(sk);
2032 }
2033 chtls_release_resources(sk);
2034 chtls_conn_done(sk);
2035 }
2036 }
2037 kfree_skb(skb);
2038 }
2039
2040 static int chtls_conn_cpl(struct chtls_dev *cdev, struct sk_buff *skb)
2041 {
2042 struct cpl_peer_close *req = cplhdr(skb) + RSS_HDR;
2043 void (*fn)(struct sock *sk, struct sk_buff *skb);
2044 unsigned int hwtid = GET_TID(req);
2045 struct sock *sk;
2046 u8 opcode;
2047
2048 opcode = ((const struct rss_header *)cplhdr(skb))->opcode;
2049
2050 sk = lookup_tid(cdev->tids, hwtid);
2051 if (!sk)
2052 goto rel_skb;
2053
2054 switch (opcode) {
2055 case CPL_PEER_CLOSE:
2056 fn = chtls_peer_close;
2057 break;
2058 case CPL_CLOSE_CON_RPL:
2059 fn = chtls_close_con_rpl;
2060 break;
2061 case CPL_ABORT_REQ_RSS:
2062 fn = chtls_abort_req_rss;
2063 break;
2064 case CPL_ABORT_RPL_RSS:
2065 fn = chtls_abort_rpl_rss;
2066 break;
2067 default:
2068 goto rel_skb;
2069 }
2070
2071 process_cpl_msg(fn, sk, skb);
2072 return 0;
2073
2074 rel_skb:
2075 kfree_skb(skb);
2076 return 0;
2077 }
2078
2079 static void chtls_rx_ack(struct sock *sk, struct sk_buff *skb)
2080 {
2081 struct cpl_fw4_ack *hdr = cplhdr(skb) + RSS_HDR;
2082 struct chtls_sock *csk = sk->sk_user_data;
2083 struct tcp_sock *tp = tcp_sk(sk);
2084 u32 credits = hdr->credits;
2085 u32 snd_una;
2086
2087 snd_una = ntohl(hdr->snd_una);
2088 csk->wr_credits += credits;
2089
2090 if (csk->wr_unacked > csk->wr_max_credits - csk->wr_credits)
2091 csk->wr_unacked = csk->wr_max_credits - csk->wr_credits;
2092
2093 while (credits) {
2094 struct sk_buff *pskb = csk->wr_skb_head;
2095 u32 csum;
2096
2097 if (unlikely(!pskb)) {
2098 if (csk->wr_nondata)
2099 csk->wr_nondata -= credits;
2100 break;
2101 }
2102 csum = (__force u32)pskb->csum;
2103 if (unlikely(credits < csum)) {
2104 pskb->csum = (__force __wsum)(csum - credits);
2105 break;
2106 }
2107 dequeue_wr(sk);
2108 credits -= csum;
2109 kfree_skb(pskb);
2110 }
2111 if (hdr->seq_vld & CPL_FW4_ACK_FLAGS_SEQVAL) {
2112 if (unlikely(before(snd_una, tp->snd_una))) {
2113 kfree_skb(skb);
2114 return;
2115 }
2116
2117 if (tp->snd_una != snd_una) {
2118 tp->snd_una = snd_una;
2119 tp->rcv_tstamp = tcp_time_stamp(tp);
2120 if (tp->snd_una == tp->snd_nxt &&
2121 !csk_flag_nochk(csk, CSK_TX_FAILOVER))
2122 csk_reset_flag(csk, CSK_TX_WAIT_IDLE);
2123 }
2124 }
2125
2126 if (hdr->seq_vld & CPL_FW4_ACK_FLAGS_CH) {
2127 unsigned int fclen16 = roundup(failover_flowc_wr_len, 16);
2128
2129 csk->wr_credits -= fclen16;
2130 csk_reset_flag(csk, CSK_TX_WAIT_IDLE);
2131 csk_reset_flag(csk, CSK_TX_FAILOVER);
2132 }
2133 if (skb_queue_len(&csk->txq) && chtls_push_frames(csk, 0))
2134 sk->sk_write_space(sk);
2135
2136 kfree_skb(skb);
2137 }
2138
2139 static int chtls_wr_ack(struct chtls_dev *cdev, struct sk_buff *skb)
2140 {
2141 struct cpl_fw4_ack *rpl = cplhdr(skb) + RSS_HDR;
2142 unsigned int hwtid = GET_TID(rpl);
2143 struct sock *sk;
2144
2145 sk = lookup_tid(cdev->tids, hwtid);
2146 if (unlikely(!sk)) {
2147 pr_err("can't find conn. for hwtid %u.\n", hwtid);
2148 return -EINVAL;
2149 }
2150 process_cpl_msg(chtls_rx_ack, sk, skb);
2151
2152 return 0;
2153 }
2154
2155 chtls_handler_func chtls_handlers[NUM_CPL_CMDS] = {
2156 [CPL_PASS_OPEN_RPL] = chtls_pass_open_rpl,
2157 [CPL_CLOSE_LISTSRV_RPL] = chtls_close_listsrv_rpl,
2158 [CPL_PASS_ACCEPT_REQ] = chtls_pass_accept_req,
2159 [CPL_PASS_ESTABLISH] = chtls_pass_establish,
2160 [CPL_RX_DATA] = chtls_rx_data,
2161 [CPL_TLS_DATA] = chtls_rx_pdu,
2162 [CPL_RX_TLS_CMP] = chtls_rx_cmp,
2163 [CPL_PEER_CLOSE] = chtls_conn_cpl,
2164 [CPL_CLOSE_CON_RPL] = chtls_conn_cpl,
2165 [CPL_ABORT_REQ_RSS] = chtls_conn_cpl,
2166 [CPL_ABORT_RPL_RSS] = chtls_conn_cpl,
2167 [CPL_FW4_ACK] = chtls_wr_ack,
2168 };
Linux with added FPC-III support