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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 <linux/ipv6.h>
22#include <net/ipv6.h>
23#include <net/transp_v6.h>
24#include <net/ip6_route.h>
25#include <net/inet_common.h>
26#include <net/tcp.h>
27#include <net/dst.h>
28#include <net/tls.h>
29#include <net/addrconf.h>
30#include <net/secure_seq.h>
31
32#include "chtls.h"
33#include "chtls_cm.h"
34#include "clip_tbl.h"
35#include "t4_tcb.h"
36
37
38
39
40
41
42static unsigned char new_state[16] = {
43
44 TCP_CLOSE,
45 TCP_FIN_WAIT1 | TCP_ACTION_FIN,
46 TCP_SYN_SENT,
47 TCP_FIN_WAIT1 | TCP_ACTION_FIN,
48 TCP_FIN_WAIT1,
49 TCP_FIN_WAIT2,
50 TCP_CLOSE,
51 TCP_CLOSE,
52 TCP_LAST_ACK | TCP_ACTION_FIN,
53 TCP_LAST_ACK,
54 TCP_CLOSE,
55 TCP_CLOSING,
56};
57
58static struct chtls_sock *chtls_sock_create(struct chtls_dev *cdev)
59{
60 struct chtls_sock *csk = kzalloc(sizeof(*csk), GFP_ATOMIC);
61
62 if (!csk)
63 return NULL;
64
65 csk->txdata_skb_cache = alloc_skb(TXDATA_SKB_LEN, GFP_ATOMIC);
66 if (!csk->txdata_skb_cache) {
67 kfree(csk);
68 return NULL;
69 }
70
71 kref_init(&csk->kref);
72 csk->cdev = cdev;
73 skb_queue_head_init(&csk->txq);
74 csk->wr_skb_head = NULL;
75 csk->wr_skb_tail = NULL;
76 csk->mss = MAX_MSS;
77 csk->tlshws.ofld = 1;
78 csk->tlshws.txkey = -1;
79 csk->tlshws.rxkey = -1;
80 csk->tlshws.mfs = TLS_MFS;
81 skb_queue_head_init(&csk->tlshws.sk_recv_queue);
82 return csk;
83}
84
85static void chtls_sock_release(struct kref *ref)
86{
87 struct chtls_sock *csk =
88 container_of(ref, struct chtls_sock, kref);
89
90 kfree(csk);
91}
92
93static struct net_device *chtls_find_netdev(struct chtls_dev *cdev,
94 struct sock *sk)
95{
96 struct adapter *adap = pci_get_drvdata(cdev->pdev);
97 struct net_device *ndev = cdev->ports[0];
98#if IS_ENABLED(CONFIG_IPV6)
99 struct net_device *temp;
100 int addr_type;
101#endif
102 int i;
103
104 switch (sk->sk_family) {
105 case PF_INET:
106 if (likely(!inet_sk(sk)->inet_rcv_saddr))
107 return ndev;
108 ndev = __ip_dev_find(&init_net, inet_sk(sk)->inet_rcv_saddr, false);
109 break;
110#if IS_ENABLED(CONFIG_IPV6)
111 case PF_INET6:
112 addr_type = ipv6_addr_type(&sk->sk_v6_rcv_saddr);
113 if (likely(addr_type == IPV6_ADDR_ANY))
114 return ndev;
115
116 for_each_netdev_rcu(&init_net, temp) {
117 if (ipv6_chk_addr(&init_net, (struct in6_addr *)
118 &sk->sk_v6_rcv_saddr, temp, 1)) {
119 ndev = temp;
120 break;
121 }
122 }
123 break;
124#endif
125 default:
126 return NULL;
127 }
128
129 if (!ndev)
130 return NULL;
131
132 if (is_vlan_dev(ndev))
133 ndev = vlan_dev_real_dev(ndev);
134
135 for_each_port(adap, i)
136 if (cdev->ports[i] == ndev)
137 return ndev;
138 return NULL;
139}
140
141static void assign_rxopt(struct sock *sk, unsigned int opt)
142{
143 const struct chtls_dev *cdev;
144 struct chtls_sock *csk;
145 struct tcp_sock *tp;
146
147 csk = rcu_dereference_sk_user_data(sk);
148 tp = tcp_sk(sk);
149
150 cdev = csk->cdev;
151 tp->tcp_header_len = sizeof(struct tcphdr);
152 tp->rx_opt.mss_clamp = cdev->mtus[TCPOPT_MSS_G(opt)] - 40;
153 tp->mss_cache = tp->rx_opt.mss_clamp;
154 tp->rx_opt.tstamp_ok = TCPOPT_TSTAMP_G(opt);
155 tp->rx_opt.snd_wscale = TCPOPT_SACK_G(opt);
156 tp->rx_opt.wscale_ok = TCPOPT_WSCALE_OK_G(opt);
157 SND_WSCALE(tp) = TCPOPT_SND_WSCALE_G(opt);
158 if (!tp->rx_opt.wscale_ok)
159 tp->rx_opt.rcv_wscale = 0;
160 if (tp->rx_opt.tstamp_ok) {
161 tp->tcp_header_len += TCPOLEN_TSTAMP_ALIGNED;
162 tp->rx_opt.mss_clamp -= TCPOLEN_TSTAMP_ALIGNED;
163 } else if (csk->opt2 & TSTAMPS_EN_F) {
164 csk->opt2 &= ~TSTAMPS_EN_F;
165 csk->mtu_idx = TCPOPT_MSS_G(opt);
166 }
167}
168
169static void chtls_purge_receive_queue(struct sock *sk)
170{
171 struct sk_buff *skb;
172
173 while ((skb = __skb_dequeue(&sk->sk_receive_queue)) != NULL) {
174 skb_dst_set(skb, (void *)NULL);
175 kfree_skb(skb);
176 }
177}
178
179static void chtls_purge_write_queue(struct sock *sk)
180{
181 struct chtls_sock *csk = rcu_dereference_sk_user_data(sk);
182 struct sk_buff *skb;
183
184 while ((skb = __skb_dequeue(&csk->txq))) {
185 sk->sk_wmem_queued -= skb->truesize;
186 __kfree_skb(skb);
187 }
188}
189
190static void chtls_purge_recv_queue(struct sock *sk)
191{
192 struct chtls_sock *csk = rcu_dereference_sk_user_data(sk);
193 struct chtls_hws *tlsk = &csk->tlshws;
194 struct sk_buff *skb;
195
196 while ((skb = __skb_dequeue(&tlsk->sk_recv_queue)) != NULL) {
197 skb_dst_set(skb, NULL);
198 kfree_skb(skb);
199 }
200}
201
202static void abort_arp_failure(void *handle, struct sk_buff *skb)
203{
204 struct cpl_abort_req *req = cplhdr(skb);
205 struct chtls_dev *cdev;
206
207 cdev = (struct chtls_dev *)handle;
208 req->cmd = CPL_ABORT_NO_RST;
209 cxgb4_ofld_send(cdev->lldi->ports[0], skb);
210}
211
212static struct sk_buff *alloc_ctrl_skb(struct sk_buff *skb, int len)
213{
214 if (likely(skb && !skb_shared(skb) && !skb_cloned(skb))) {
215 __skb_trim(skb, 0);
216 refcount_inc(&skb->users);
217 } else {
218 skb = alloc_skb(len, GFP_KERNEL | __GFP_NOFAIL);
219 }
220 return skb;
221}
222
223static void chtls_send_abort(struct sock *sk, int mode, struct sk_buff *skb)
224{
225 struct cpl_abort_req *req;
226 struct chtls_sock *csk;
227 struct tcp_sock *tp;
228
229 csk = rcu_dereference_sk_user_data(sk);
230 tp = tcp_sk(sk);
231
232 if (!skb)
233 skb = alloc_ctrl_skb(csk->txdata_skb_cache, sizeof(*req));
234
235 req = (struct cpl_abort_req *)skb_put(skb, sizeof(*req));
236 INIT_TP_WR_CPL(req, CPL_ABORT_REQ, csk->tid);
237 skb_set_queue_mapping(skb, (csk->txq_idx << 1) | CPL_PRIORITY_DATA);
238 req->rsvd0 = htonl(tp->snd_nxt);
239 req->rsvd1 = !csk_flag_nochk(csk, CSK_TX_DATA_SENT);
240 req->cmd = mode;
241 t4_set_arp_err_handler(skb, csk->cdev, abort_arp_failure);
242 send_or_defer(sk, tp, skb, mode == CPL_ABORT_SEND_RST);
243}
244
245static void chtls_send_reset(struct sock *sk, int mode, struct sk_buff *skb)
246{
247 struct chtls_sock *csk = rcu_dereference_sk_user_data(sk);
248
249 if (unlikely(csk_flag_nochk(csk, CSK_ABORT_SHUTDOWN) ||
250 !csk->cdev)) {
251 if (sk->sk_state == TCP_SYN_RECV)
252 csk_set_flag(csk, CSK_RST_ABORTED);
253 goto out;
254 }
255
256 if (!csk_flag_nochk(csk, CSK_TX_DATA_SENT)) {
257 struct tcp_sock *tp = tcp_sk(sk);
258
259 if (send_tx_flowc_wr(sk, 0, tp->snd_nxt, tp->rcv_nxt) < 0)
260 WARN_ONCE(1, "send tx flowc error");
261 csk_set_flag(csk, CSK_TX_DATA_SENT);
262 }
263
264 csk_set_flag(csk, CSK_ABORT_RPL_PENDING);
265 chtls_purge_write_queue(sk);
266
267 csk_set_flag(csk, CSK_ABORT_SHUTDOWN);
268 if (sk->sk_state != TCP_SYN_RECV)
269 chtls_send_abort(sk, mode, skb);
270 else
271 chtls_set_tcb_field_rpl_skb(sk, TCB_T_FLAGS_W,
272 TCB_T_FLAGS_V(TCB_T_FLAGS_M), 0,
273 TCB_FIELD_COOKIE_TFLAG, 1);
274
275 return;
276out:
277 kfree_skb(skb);
278}
279
280static void release_tcp_port(struct sock *sk)
281{
282 if (inet_csk(sk)->icsk_bind_hash)
283 inet_put_port(sk);
284}
285
286static void tcp_uncork(struct sock *sk)
287{
288 struct tcp_sock *tp = tcp_sk(sk);
289
290 if (tp->nonagle & TCP_NAGLE_CORK) {
291 tp->nonagle &= ~TCP_NAGLE_CORK;
292 chtls_tcp_push(sk, 0);
293 }
294}
295
296static void chtls_close_conn(struct sock *sk)
297{
298 struct cpl_close_con_req *req;
299 struct chtls_sock *csk;
300 struct sk_buff *skb;
301 unsigned int tid;
302 unsigned int len;
303
304 len = roundup(sizeof(struct cpl_close_con_req), 16);
305 csk = rcu_dereference_sk_user_data(sk);
306 tid = csk->tid;
307
308 skb = alloc_skb(len, GFP_KERNEL | __GFP_NOFAIL);
309 req = (struct cpl_close_con_req *)__skb_put(skb, len);
310 memset(req, 0, len);
311 req->wr.wr_hi = htonl(FW_WR_OP_V(FW_TP_WR) |
312 FW_WR_IMMDLEN_V(sizeof(*req) -
313 sizeof(req->wr)));
314 req->wr.wr_mid = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*req), 16)) |
315 FW_WR_FLOWID_V(tid));
316
317 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid));
318
319 tcp_uncork(sk);
320 skb_entail(sk, skb, ULPCB_FLAG_NO_HDR | ULPCB_FLAG_NO_APPEND);
321 if (sk->sk_state != TCP_SYN_SENT)
322 chtls_push_frames(csk, 1);
323}
324
325
326
327
328
329
330static int make_close_transition(struct sock *sk)
331{
332 int next = (int)new_state[sk->sk_state];
333
334 tcp_set_state(sk, next & TCP_STATE_MASK);
335 return next & TCP_ACTION_FIN;
336}
337
338void chtls_close(struct sock *sk, long timeout)
339{
340 int data_lost, prev_state;
341 struct chtls_sock *csk;
342
343 csk = rcu_dereference_sk_user_data(sk);
344
345 lock_sock(sk);
346 sk->sk_shutdown |= SHUTDOWN_MASK;
347
348 data_lost = skb_queue_len(&sk->sk_receive_queue);
349 data_lost |= skb_queue_len(&csk->tlshws.sk_recv_queue);
350 chtls_purge_recv_queue(sk);
351 chtls_purge_receive_queue(sk);
352
353 if (sk->sk_state == TCP_CLOSE) {
354 goto wait;
355 } else if (data_lost || sk->sk_state == TCP_SYN_SENT) {
356 chtls_send_reset(sk, CPL_ABORT_SEND_RST, NULL);
357 release_tcp_port(sk);
358 goto unlock;
359 } else if (sock_flag(sk, SOCK_LINGER) && !sk->sk_lingertime) {
360 sk->sk_prot->disconnect(sk, 0);
361 } else if (make_close_transition(sk)) {
362 chtls_close_conn(sk);
363 }
364wait:
365 if (timeout)
366 sk_stream_wait_close(sk, timeout);
367
368unlock:
369 prev_state = sk->sk_state;
370 sock_hold(sk);
371 sock_orphan(sk);
372
373 release_sock(sk);
374
375 local_bh_disable();
376 bh_lock_sock(sk);
377
378 if (prev_state != TCP_CLOSE && sk->sk_state == TCP_CLOSE)
379 goto out;
380
381 if (sk->sk_state == TCP_FIN_WAIT2 && tcp_sk(sk)->linger2 < 0 &&
382 !csk_flag(sk, CSK_ABORT_SHUTDOWN)) {
383 struct sk_buff *skb;
384
385 skb = alloc_skb(sizeof(struct cpl_abort_req), GFP_ATOMIC);
386 if (skb)
387 chtls_send_reset(sk, CPL_ABORT_SEND_RST, skb);
388 }
389
390 if (sk->sk_state == TCP_CLOSE)
391 inet_csk_destroy_sock(sk);
392
393out:
394 bh_unlock_sock(sk);
395 local_bh_enable();
396 sock_put(sk);
397}
398
399
400
401
402static int wait_for_states(struct sock *sk, unsigned int states)
403{
404 DECLARE_WAITQUEUE(wait, current);
405 struct socket_wq _sk_wq;
406 long current_timeo;
407 int err = 0;
408
409 current_timeo = 200;
410
411
412
413
414
415 if (!sk->sk_wq) {
416 init_waitqueue_head(&_sk_wq.wait);
417 _sk_wq.fasync_list = NULL;
418 init_rcu_head_on_stack(&_sk_wq.rcu);
419 RCU_INIT_POINTER(sk->sk_wq, &_sk_wq);
420 }
421
422 add_wait_queue(sk_sleep(sk), &wait);
423 while (!sk_in_state(sk, states)) {
424 if (!current_timeo) {
425 err = -EBUSY;
426 break;
427 }
428 if (signal_pending(current)) {
429 err = sock_intr_errno(current_timeo);
430 break;
431 }
432 set_current_state(TASK_UNINTERRUPTIBLE);
433 release_sock(sk);
434 if (!sk_in_state(sk, states))
435 current_timeo = schedule_timeout(current_timeo);
436 __set_current_state(TASK_RUNNING);
437 lock_sock(sk);
438 }
439 remove_wait_queue(sk_sleep(sk), &wait);
440
441 if (rcu_dereference(sk->sk_wq) == &_sk_wq)
442 sk->sk_wq = NULL;
443 return err;
444}
445
446int chtls_disconnect(struct sock *sk, int flags)
447{
448 struct tcp_sock *tp;
449 int err;
450
451 tp = tcp_sk(sk);
452 chtls_purge_recv_queue(sk);
453 chtls_purge_receive_queue(sk);
454 chtls_purge_write_queue(sk);
455
456 if (sk->sk_state != TCP_CLOSE) {
457 sk->sk_err = ECONNRESET;
458 chtls_send_reset(sk, CPL_ABORT_SEND_RST, NULL);
459 err = wait_for_states(sk, TCPF_CLOSE);
460 if (err)
461 return err;
462 }
463 chtls_purge_recv_queue(sk);
464 chtls_purge_receive_queue(sk);
465 tp->max_window = 0xFFFF << (tp->rx_opt.snd_wscale);
466 return tcp_disconnect(sk, flags);
467}
468
469#define SHUTDOWN_ELIGIBLE_STATE (TCPF_ESTABLISHED | \
470 TCPF_SYN_RECV | TCPF_CLOSE_WAIT)
471void chtls_shutdown(struct sock *sk, int how)
472{
473 if ((how & SEND_SHUTDOWN) &&
474 sk_in_state(sk, SHUTDOWN_ELIGIBLE_STATE) &&
475 make_close_transition(sk))
476 chtls_close_conn(sk);
477}
478
479void chtls_destroy_sock(struct sock *sk)
480{
481 struct chtls_sock *csk;
482
483 csk = rcu_dereference_sk_user_data(sk);
484 chtls_purge_recv_queue(sk);
485 csk->ulp_mode = ULP_MODE_NONE;
486 chtls_purge_write_queue(sk);
487 free_tls_keyid(sk);
488 kref_put(&csk->kref, chtls_sock_release);
489 if (sk->sk_family == AF_INET)
490 sk->sk_prot = &tcp_prot;
491#if IS_ENABLED(CONFIG_IPV6)
492 else
493 sk->sk_prot = &tcpv6_prot;
494#endif
495 sk->sk_prot->destroy(sk);
496}
497
498static void reset_listen_child(struct sock *child)
499{
500 struct chtls_sock *csk = rcu_dereference_sk_user_data(child);
501 struct sk_buff *skb;
502
503 skb = alloc_ctrl_skb(csk->txdata_skb_cache,
504 sizeof(struct cpl_abort_req));
505
506 chtls_send_reset(child, CPL_ABORT_SEND_RST, skb);
507 sock_orphan(child);
508 INC_ORPHAN_COUNT(child);
509 if (child->sk_state == TCP_CLOSE)
510 inet_csk_destroy_sock(child);
511}
512
513static void chtls_disconnect_acceptq(struct sock *listen_sk)
514{
515 struct request_sock **pprev;
516
517 pprev = ACCEPT_QUEUE(listen_sk);
518 while (*pprev) {
519 struct request_sock *req = *pprev;
520
521 if (req->rsk_ops == &chtls_rsk_ops ||
522 req->rsk_ops == &chtls_rsk_opsv6) {
523 struct sock *child = req->sk;
524
525 *pprev = req->dl_next;
526 sk_acceptq_removed(listen_sk);
527 reqsk_put(req);
528 sock_hold(child);
529 local_bh_disable();
530 bh_lock_sock(child);
531 release_tcp_port(child);
532 reset_listen_child(child);
533 bh_unlock_sock(child);
534 local_bh_enable();
535 sock_put(child);
536 } else {
537 pprev = &req->dl_next;
538 }
539 }
540}
541
542static int listen_hashfn(const struct sock *sk)
543{
544 return ((unsigned long)sk >> 10) & (LISTEN_INFO_HASH_SIZE - 1);
545}
546
547static struct listen_info *listen_hash_add(struct chtls_dev *cdev,
548 struct sock *sk,
549 unsigned int stid)
550{
551 struct listen_info *p = kmalloc(sizeof(*p), GFP_KERNEL);
552
553 if (p) {
554 int key = listen_hashfn(sk);
555
556 p->sk = sk;
557 p->stid = stid;
558 spin_lock(&cdev->listen_lock);
559 p->next = cdev->listen_hash_tab[key];
560 cdev->listen_hash_tab[key] = p;
561 spin_unlock(&cdev->listen_lock);
562 }
563 return p;
564}
565
566static int listen_hash_find(struct chtls_dev *cdev,
567 struct sock *sk)
568{
569 struct listen_info *p;
570 int stid = -1;
571 int key;
572
573 key = listen_hashfn(sk);
574
575 spin_lock(&cdev->listen_lock);
576 for (p = cdev->listen_hash_tab[key]; p; p = p->next)
577 if (p->sk == sk) {
578 stid = p->stid;
579 break;
580 }
581 spin_unlock(&cdev->listen_lock);
582 return stid;
583}
584
585static int listen_hash_del(struct chtls_dev *cdev,
586 struct sock *sk)
587{
588 struct listen_info *p, **prev;
589 int stid = -1;
590 int key;
591
592 key = listen_hashfn(sk);
593 prev = &cdev->listen_hash_tab[key];
594
595 spin_lock(&cdev->listen_lock);
596 for (p = *prev; p; prev = &p->next, p = p->next)
597 if (p->sk == sk) {
598 stid = p->stid;
599 *prev = p->next;
600 kfree(p);
601 break;
602 }
603 spin_unlock(&cdev->listen_lock);
604 return stid;
605}
606
607static void cleanup_syn_rcv_conn(struct sock *child, struct sock *parent)
608{
609 struct request_sock *req;
610 struct chtls_sock *csk;
611
612 csk = rcu_dereference_sk_user_data(child);
613 req = csk->passive_reap_next;
614
615 reqsk_queue_removed(&inet_csk(parent)->icsk_accept_queue, req);
616 __skb_unlink((struct sk_buff *)&csk->synq, &csk->listen_ctx->synq);
617 chtls_reqsk_free(req);
618 csk->passive_reap_next = NULL;
619}
620
621static void chtls_reset_synq(struct listen_ctx *listen_ctx)
622{
623 struct sock *listen_sk = listen_ctx->lsk;
624
625 while (!skb_queue_empty(&listen_ctx->synq)) {
626 struct chtls_sock *csk =
627 container_of((struct synq *)skb_peek
628 (&listen_ctx->synq), struct chtls_sock, synq);
629 struct sock *child = csk->sk;
630
631 cleanup_syn_rcv_conn(child, listen_sk);
632 sock_hold(child);
633 local_bh_disable();
634 bh_lock_sock(child);
635 release_tcp_port(child);
636 reset_listen_child(child);
637 bh_unlock_sock(child);
638 local_bh_enable();
639 sock_put(child);
640 }
641}
642
643int chtls_listen_start(struct chtls_dev *cdev, struct sock *sk)
644{
645 struct net_device *ndev;
646#if IS_ENABLED(CONFIG_IPV6)
647 bool clip_valid = false;
648#endif
649 struct listen_ctx *ctx;
650 struct adapter *adap;
651 struct port_info *pi;
652 int ret = 0;
653 int stid;
654
655 rcu_read_lock();
656 ndev = chtls_find_netdev(cdev, sk);
657 rcu_read_unlock();
658 if (!ndev)
659 return -EBADF;
660
661 pi = netdev_priv(ndev);
662 adap = pi->adapter;
663 if (!(adap->flags & CXGB4_FULL_INIT_DONE))
664 return -EBADF;
665
666 if (listen_hash_find(cdev, sk) >= 0)
667 return -EADDRINUSE;
668
669 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
670 if (!ctx)
671 return -ENOMEM;
672
673 __module_get(THIS_MODULE);
674 ctx->lsk = sk;
675 ctx->cdev = cdev;
676 ctx->state = T4_LISTEN_START_PENDING;
677 skb_queue_head_init(&ctx->synq);
678
679 stid = cxgb4_alloc_stid(cdev->tids, sk->sk_family, ctx);
680 if (stid < 0)
681 goto free_ctx;
682
683 sock_hold(sk);
684 if (!listen_hash_add(cdev, sk, stid))
685 goto free_stid;
686
687 if (sk->sk_family == PF_INET) {
688 ret = cxgb4_create_server(ndev, stid,
689 inet_sk(sk)->inet_rcv_saddr,
690 inet_sk(sk)->inet_sport, 0,
691 cdev->lldi->rxq_ids[0]);
692#if IS_ENABLED(CONFIG_IPV6)
693 } else {
694 int addr_type;
695
696 addr_type = ipv6_addr_type(&sk->sk_v6_rcv_saddr);
697 if (addr_type != IPV6_ADDR_ANY) {
698 ret = cxgb4_clip_get(ndev, (const u32 *)
699 &sk->sk_v6_rcv_saddr, 1);
700 if (ret)
701 goto del_hash;
702 clip_valid = true;
703 }
704 ret = cxgb4_create_server6(ndev, stid,
705 &sk->sk_v6_rcv_saddr,
706 inet_sk(sk)->inet_sport,
707 cdev->lldi->rxq_ids[0]);
708#endif
709 }
710 if (ret > 0)
711 ret = net_xmit_errno(ret);
712 if (ret)
713 goto del_hash;
714 return 0;
715del_hash:
716#if IS_ENABLED(CONFIG_IPV6)
717 if (clip_valid)
718 cxgb4_clip_release(ndev, (const u32 *)&sk->sk_v6_rcv_saddr, 1);
719#endif
720 listen_hash_del(cdev, sk);
721free_stid:
722 cxgb4_free_stid(cdev->tids, stid, sk->sk_family);
723 sock_put(sk);
724free_ctx:
725 kfree(ctx);
726 module_put(THIS_MODULE);
727 return -EBADF;
728}
729
730void chtls_listen_stop(struct chtls_dev *cdev, struct sock *sk)
731{
732 struct listen_ctx *listen_ctx;
733 int stid;
734
735 stid = listen_hash_del(cdev, sk);
736 if (stid < 0)
737 return;
738
739 listen_ctx = (struct listen_ctx *)lookup_stid(cdev->tids, stid);
740 chtls_reset_synq(listen_ctx);
741
742 cxgb4_remove_server(cdev->lldi->ports[0], stid,
743 cdev->lldi->rxq_ids[0], sk->sk_family == PF_INET6);
744
745#if IS_ENABLED(CONFIG_IPV6)
746 if (sk->sk_family == PF_INET6) {
747 struct net_device *ndev = chtls_find_netdev(cdev, sk);
748 int addr_type = 0;
749
750 addr_type = ipv6_addr_type((const struct in6_addr *)
751 &sk->sk_v6_rcv_saddr);
752 if (addr_type != IPV6_ADDR_ANY)
753 cxgb4_clip_release(ndev, (const u32 *)
754 &sk->sk_v6_rcv_saddr, 1);
755 }
756#endif
757 chtls_disconnect_acceptq(sk);
758}
759
760static int chtls_pass_open_rpl(struct chtls_dev *cdev, struct sk_buff *skb)
761{
762 struct cpl_pass_open_rpl *rpl = cplhdr(skb) + RSS_HDR;
763 unsigned int stid = GET_TID(rpl);
764 struct listen_ctx *listen_ctx;
765
766 listen_ctx = (struct listen_ctx *)lookup_stid(cdev->tids, stid);
767 if (!listen_ctx)
768 return CPL_RET_BUF_DONE;
769
770 if (listen_ctx->state == T4_LISTEN_START_PENDING) {
771 listen_ctx->state = T4_LISTEN_STARTED;
772 return CPL_RET_BUF_DONE;
773 }
774
775 if (rpl->status != CPL_ERR_NONE) {
776 pr_info("Unexpected PASS_OPEN_RPL status %u for STID %u\n",
777 rpl->status, stid);
778 } else {
779 cxgb4_free_stid(cdev->tids, stid, listen_ctx->lsk->sk_family);
780 sock_put(listen_ctx->lsk);
781 kfree(listen_ctx);
782 module_put(THIS_MODULE);
783 }
784 return CPL_RET_BUF_DONE;
785}
786
787static int chtls_close_listsrv_rpl(struct chtls_dev *cdev, struct sk_buff *skb)
788{
789 struct cpl_close_listsvr_rpl *rpl = cplhdr(skb) + RSS_HDR;
790 struct listen_ctx *listen_ctx;
791 unsigned int stid;
792 void *data;
793
794 stid = GET_TID(rpl);
795 data = lookup_stid(cdev->tids, stid);
796 listen_ctx = (struct listen_ctx *)data;
797
798 if (rpl->status != CPL_ERR_NONE) {
799 pr_info("Unexpected CLOSE_LISTSRV_RPL status %u for STID %u\n",
800 rpl->status, stid);
801 } else {
802 cxgb4_free_stid(cdev->tids, stid, listen_ctx->lsk->sk_family);
803 sock_put(listen_ctx->lsk);
804 kfree(listen_ctx);
805 module_put(THIS_MODULE);
806 }
807 return CPL_RET_BUF_DONE;
808}
809
810static void chtls_purge_wr_queue(struct sock *sk)
811{
812 struct sk_buff *skb;
813
814 while ((skb = dequeue_wr(sk)) != NULL)
815 kfree_skb(skb);
816}
817
818static void chtls_release_resources(struct sock *sk)
819{
820 struct chtls_sock *csk = rcu_dereference_sk_user_data(sk);
821 struct chtls_dev *cdev = csk->cdev;
822 unsigned int tid = csk->tid;
823 struct tid_info *tids;
824
825 if (!cdev)
826 return;
827
828 tids = cdev->tids;
829 kfree_skb(csk->txdata_skb_cache);
830 csk->txdata_skb_cache = NULL;
831
832 if (csk->wr_credits != csk->wr_max_credits) {
833 chtls_purge_wr_queue(sk);
834 chtls_reset_wr_list(csk);
835 }
836
837 if (csk->l2t_entry) {
838 cxgb4_l2t_release(csk->l2t_entry);
839 csk->l2t_entry = NULL;
840 }
841
842 if (sk->sk_state != TCP_SYN_SENT) {
843 cxgb4_remove_tid(tids, csk->port_id, tid, sk->sk_family);
844 sock_put(sk);
845 }
846}
847
848static void chtls_conn_done(struct sock *sk)
849{
850 if (sock_flag(sk, SOCK_DEAD))
851 chtls_purge_receive_queue(sk);
852 sk_wakeup_sleepers(sk, 0);
853 tcp_done(sk);
854}
855
856static void do_abort_syn_rcv(struct sock *child, struct sock *parent)
857{
858
859
860
861
862
863 if (likely(parent->sk_state == TCP_LISTEN)) {
864 cleanup_syn_rcv_conn(child, parent);
865
866
867
868
869
870
871
872 sock_orphan(child);
873 percpu_counter_inc((child)->sk_prot->orphan_count);
874 chtls_release_resources(child);
875 chtls_conn_done(child);
876 } else {
877 if (csk_flag(child, CSK_RST_ABORTED)) {
878 chtls_release_resources(child);
879 chtls_conn_done(child);
880 }
881 }
882}
883
884static void pass_open_abort(struct sock *child, struct sock *parent,
885 struct sk_buff *skb)
886{
887 do_abort_syn_rcv(child, parent);
888 kfree_skb(skb);
889}
890
891static void bl_pass_open_abort(struct sock *lsk, struct sk_buff *skb)
892{
893 pass_open_abort(skb->sk, lsk, skb);
894}
895
896static void chtls_pass_open_arp_failure(struct sock *sk,
897 struct sk_buff *skb)
898{
899 const struct request_sock *oreq;
900 struct chtls_sock *csk;
901 struct chtls_dev *cdev;
902 struct sock *parent;
903 void *data;
904
905 csk = rcu_dereference_sk_user_data(sk);
906 cdev = csk->cdev;
907
908
909
910
911
912
913 if (csk_flag(sk, CSK_ABORT_RPL_PENDING)) {
914 kfree_skb(skb);
915 return;
916 }
917
918 oreq = csk->passive_reap_next;
919 data = lookup_stid(cdev->tids, oreq->ts_recent);
920 parent = ((struct listen_ctx *)data)->lsk;
921
922 bh_lock_sock(parent);
923 if (!sock_owned_by_user(parent)) {
924 pass_open_abort(sk, parent, skb);
925 } else {
926 BLOG_SKB_CB(skb)->backlog_rcv = bl_pass_open_abort;
927 __sk_add_backlog(parent, skb);
928 }
929 bh_unlock_sock(parent);
930}
931
932static void chtls_accept_rpl_arp_failure(void *handle,
933 struct sk_buff *skb)
934{
935 struct sock *sk = (struct sock *)handle;
936
937 sock_hold(sk);
938 process_cpl_msg(chtls_pass_open_arp_failure, sk, skb);
939 sock_put(sk);
940}
941
942static unsigned int chtls_select_mss(const struct chtls_sock *csk,
943 unsigned int pmtu,
944 struct cpl_pass_accept_req *req)
945{
946 struct chtls_dev *cdev;
947 struct dst_entry *dst;
948 unsigned int tcpoptsz;
949 unsigned int iphdrsz;
950 unsigned int mtu_idx;
951 struct tcp_sock *tp;
952 unsigned int mss;
953 struct sock *sk;
954
955 mss = ntohs(req->tcpopt.mss);
956 sk = csk->sk;
957 dst = __sk_dst_get(sk);
958 cdev = csk->cdev;
959 tp = tcp_sk(sk);
960 tcpoptsz = 0;
961
962#if IS_ENABLED(CONFIG_IPV6)
963 if (sk->sk_family == AF_INET6)
964 iphdrsz = sizeof(struct ipv6hdr) + sizeof(struct tcphdr);
965 else
966#endif
967 iphdrsz = sizeof(struct iphdr) + sizeof(struct tcphdr);
968 if (req->tcpopt.tstamp)
969 tcpoptsz += round_up(TCPOLEN_TIMESTAMP, 4);
970
971 tp->advmss = dst_metric_advmss(dst);
972 if (USER_MSS(tp) && tp->advmss > USER_MSS(tp))
973 tp->advmss = USER_MSS(tp);
974 if (tp->advmss > pmtu - iphdrsz)
975 tp->advmss = pmtu - iphdrsz;
976 if (mss && tp->advmss > mss)
977 tp->advmss = mss;
978
979 tp->advmss = cxgb4_best_aligned_mtu(cdev->lldi->mtus,
980 iphdrsz + tcpoptsz,
981 tp->advmss - tcpoptsz,
982 8, &mtu_idx);
983 tp->advmss -= iphdrsz;
984
985 inet_csk(sk)->icsk_pmtu_cookie = pmtu;
986 return mtu_idx;
987}
988
989static unsigned int select_rcv_wscale(int space, int wscale_ok, int win_clamp)
990{
991 int wscale = 0;
992
993 if (space > MAX_RCV_WND)
994 space = MAX_RCV_WND;
995 if (win_clamp && win_clamp < space)
996 space = win_clamp;
997
998 if (wscale_ok) {
999 while (wscale < 14 && (65535 << wscale) < space)
1000 wscale++;
1001 }
1002 return wscale;
1003}
1004
1005static void chtls_pass_accept_rpl(struct sk_buff *skb,
1006 struct cpl_pass_accept_req *req,
1007 unsigned int tid)
1008
1009{
1010 struct cpl_t5_pass_accept_rpl *rpl5;
1011 struct cxgb4_lld_info *lldi;
1012 const struct tcphdr *tcph;
1013 const struct tcp_sock *tp;
1014 struct chtls_sock *csk;
1015 unsigned int len;
1016 struct sock *sk;
1017 u32 opt2, hlen;
1018 u64 opt0;
1019
1020 sk = skb->sk;
1021 tp = tcp_sk(sk);
1022 csk = sk->sk_user_data;
1023 csk->tid = tid;
1024 lldi = csk->cdev->lldi;
1025 len = roundup(sizeof(*rpl5), 16);
1026
1027 rpl5 = __skb_put_zero(skb, len);
1028 INIT_TP_WR(rpl5, tid);
1029
1030 OPCODE_TID(rpl5) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
1031 csk->tid));
1032 csk->mtu_idx = chtls_select_mss(csk, dst_mtu(__sk_dst_get(sk)),
1033 req);
1034 opt0 = TCAM_BYPASS_F |
1035 WND_SCALE_V(RCV_WSCALE(tp)) |
1036 MSS_IDX_V(csk->mtu_idx) |
1037 L2T_IDX_V(csk->l2t_entry->idx) |
1038 NAGLE_V(!(tp->nonagle & TCP_NAGLE_OFF)) |
1039 TX_CHAN_V(csk->tx_chan) |
1040 SMAC_SEL_V(csk->smac_idx) |
1041 DSCP_V(csk->tos >> 2) |
1042 ULP_MODE_V(ULP_MODE_TLS) |
1043 RCV_BUFSIZ_V(min(tp->rcv_wnd >> 10, RCV_BUFSIZ_M));
1044
1045 opt2 = RX_CHANNEL_V(0) |
1046 RSS_QUEUE_VALID_F | RSS_QUEUE_V(csk->rss_qid);
1047
1048 if (!is_t5(lldi->adapter_type))
1049 opt2 |= RX_FC_DISABLE_F;
1050 if (req->tcpopt.tstamp)
1051 opt2 |= TSTAMPS_EN_F;
1052 if (req->tcpopt.sack)
1053 opt2 |= SACK_EN_F;
1054 hlen = ntohl(req->hdr_len);
1055
1056 tcph = (struct tcphdr *)((u8 *)(req + 1) +
1057 T6_ETH_HDR_LEN_G(hlen) + T6_IP_HDR_LEN_G(hlen));
1058 if (tcph->ece && tcph->cwr)
1059 opt2 |= CCTRL_ECN_V(1);
1060 opt2 |= CONG_CNTRL_V(CONG_ALG_NEWRENO);
1061 opt2 |= T5_ISS_F;
1062 opt2 |= T5_OPT_2_VALID_F;
1063 opt2 |= WND_SCALE_EN_V(WSCALE_OK(tp));
1064 rpl5->opt0 = cpu_to_be64(opt0);
1065 rpl5->opt2 = cpu_to_be32(opt2);
1066 rpl5->iss = cpu_to_be32((prandom_u32() & ~7UL) - 1);
1067 set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
1068 t4_set_arp_err_handler(skb, sk, chtls_accept_rpl_arp_failure);
1069 cxgb4_l2t_send(csk->egress_dev, skb, csk->l2t_entry);
1070}
1071
1072static void inet_inherit_port(struct inet_hashinfo *hash_info,
1073 struct sock *lsk, struct sock *newsk)
1074{
1075 local_bh_disable();
1076 __inet_inherit_port(lsk, newsk);
1077 local_bh_enable();
1078}
1079
1080static int chtls_backlog_rcv(struct sock *sk, struct sk_buff *skb)
1081{
1082 if (skb->protocol) {
1083 kfree_skb(skb);
1084 return 0;
1085 }
1086 BLOG_SKB_CB(skb)->backlog_rcv(sk, skb);
1087 return 0;
1088}
1089
1090static void chtls_set_tcp_window(struct chtls_sock *csk)
1091{
1092 struct net_device *ndev = csk->egress_dev;
1093 struct port_info *pi = netdev_priv(ndev);
1094 unsigned int linkspeed;
1095 u8 scale;
1096
1097 linkspeed = pi->link_cfg.speed;
1098 scale = linkspeed / SPEED_10000;
1099#define CHTLS_10G_RCVWIN (256 * 1024)
1100 csk->rcv_win = CHTLS_10G_RCVWIN;
1101 if (scale)
1102 csk->rcv_win *= scale;
1103#define CHTLS_10G_SNDWIN (256 * 1024)
1104 csk->snd_win = CHTLS_10G_SNDWIN;
1105 if (scale)
1106 csk->snd_win *= scale;
1107}
1108
1109static struct sock *chtls_recv_sock(struct sock *lsk,
1110 struct request_sock *oreq,
1111 void *network_hdr,
1112 const struct cpl_pass_accept_req *req,
1113 struct chtls_dev *cdev)
1114{
1115 struct adapter *adap = pci_get_drvdata(cdev->pdev);
1116 struct neighbour *n = NULL;
1117 struct inet_sock *newinet;
1118 const struct iphdr *iph;
1119 struct tls_context *ctx;
1120 struct net_device *ndev;
1121 struct chtls_sock *csk;
1122 struct dst_entry *dst;
1123 struct tcp_sock *tp;
1124 struct sock *newsk;
1125 bool found = false;
1126 u16 port_id;
1127 int rxq_idx;
1128 int step, i;
1129
1130 iph = (const struct iphdr *)network_hdr;
1131 newsk = tcp_create_openreq_child(lsk, oreq, cdev->askb);
1132 if (!newsk)
1133 goto free_oreq;
1134
1135 if (lsk->sk_family == AF_INET) {
1136 dst = inet_csk_route_child_sock(lsk, newsk, oreq);
1137 if (!dst)
1138 goto free_sk;
1139
1140 n = dst_neigh_lookup(dst, &iph->saddr);
1141#if IS_ENABLED(CONFIG_IPV6)
1142 } else {
1143 const struct ipv6hdr *ip6h;
1144 struct flowi6 fl6;
1145
1146 ip6h = (const struct ipv6hdr *)network_hdr;
1147 memset(&fl6, 0, sizeof(fl6));
1148 fl6.flowi6_proto = IPPROTO_TCP;
1149 fl6.saddr = ip6h->daddr;
1150 fl6.daddr = ip6h->saddr;
1151 fl6.fl6_dport = inet_rsk(oreq)->ir_rmt_port;
1152 fl6.fl6_sport = htons(inet_rsk(oreq)->ir_num);
1153 security_req_classify_flow(oreq, flowi6_to_flowi_common(&fl6));
1154 dst = ip6_dst_lookup_flow(sock_net(lsk), lsk, &fl6, NULL);
1155 if (IS_ERR(dst))
1156 goto free_sk;
1157 n = dst_neigh_lookup(dst, &ip6h->saddr);
1158#endif
1159 }
1160 if (!n || !n->dev)
1161 goto free_dst;
1162
1163 ndev = n->dev;
1164 if (is_vlan_dev(ndev))
1165 ndev = vlan_dev_real_dev(ndev);
1166
1167 for_each_port(adap, i)
1168 if (cdev->ports[i] == ndev)
1169 found = true;
1170
1171 if (!found)
1172 goto free_dst;
1173
1174 port_id = cxgb4_port_idx(ndev);
1175
1176 csk = chtls_sock_create(cdev);
1177 if (!csk)
1178 goto free_dst;
1179
1180 csk->l2t_entry = cxgb4_l2t_get(cdev->lldi->l2t, n, ndev, 0);
1181 if (!csk->l2t_entry)
1182 goto free_csk;
1183
1184 newsk->sk_user_data = csk;
1185 newsk->sk_backlog_rcv = chtls_backlog_rcv;
1186
1187 tp = tcp_sk(newsk);
1188 newinet = inet_sk(newsk);
1189
1190 if (iph->version == 0x4) {
1191 newinet->inet_daddr = iph->saddr;
1192 newinet->inet_rcv_saddr = iph->daddr;
1193 newinet->inet_saddr = iph->daddr;
1194#if IS_ENABLED(CONFIG_IPV6)
1195 } else {
1196 struct tcp6_sock *newtcp6sk = (struct tcp6_sock *)newsk;
1197 struct inet_request_sock *treq = inet_rsk(oreq);
1198 struct ipv6_pinfo *newnp = inet6_sk(newsk);
1199 struct ipv6_pinfo *np = inet6_sk(lsk);
1200
1201 inet_sk(newsk)->pinet6 = &newtcp6sk->inet6;
1202 memcpy(newnp, np, sizeof(struct ipv6_pinfo));
1203 newsk->sk_v6_daddr = treq->ir_v6_rmt_addr;
1204 newsk->sk_v6_rcv_saddr = treq->ir_v6_loc_addr;
1205 inet6_sk(newsk)->saddr = treq->ir_v6_loc_addr;
1206 newnp->ipv6_fl_list = NULL;
1207 newnp->pktoptions = NULL;
1208 newsk->sk_bound_dev_if = treq->ir_iif;
1209 newinet->inet_opt = NULL;
1210 newinet->inet_daddr = LOOPBACK4_IPV6;
1211 newinet->inet_saddr = LOOPBACK4_IPV6;
1212#endif
1213 }
1214
1215 oreq->ts_recent = PASS_OPEN_TID_G(ntohl(req->tos_stid));
1216 sk_setup_caps(newsk, dst);
1217 ctx = tls_get_ctx(lsk);
1218 newsk->sk_destruct = ctx->sk_destruct;
1219 newsk->sk_prot_creator = lsk->sk_prot_creator;
1220 csk->sk = newsk;
1221 csk->passive_reap_next = oreq;
1222 csk->tx_chan = cxgb4_port_chan(ndev);
1223 csk->port_id = port_id;
1224 csk->egress_dev = ndev;
1225 csk->tos = PASS_OPEN_TOS_G(ntohl(req->tos_stid));
1226 chtls_set_tcp_window(csk);
1227 tp->rcv_wnd = csk->rcv_win;
1228 csk->sndbuf = csk->snd_win;
1229 csk->ulp_mode = ULP_MODE_TLS;
1230 step = cdev->lldi->nrxq / cdev->lldi->nchan;
1231 rxq_idx = port_id * step;
1232 rxq_idx += cdev->round_robin_cnt++ % step;
1233 csk->rss_qid = cdev->lldi->rxq_ids[rxq_idx];
1234 csk->txq_idx = (rxq_idx < cdev->lldi->ntxq) ? rxq_idx :
1235 port_id * step;
1236 csk->sndbuf = newsk->sk_sndbuf;
1237 csk->smac_idx = ((struct port_info *)netdev_priv(ndev))->smt_idx;
1238 RCV_WSCALE(tp) = select_rcv_wscale(tcp_full_space(newsk),
1239 sock_net(newsk)->
1240 ipv4.sysctl_tcp_window_scaling,
1241 tp->window_clamp);
1242 neigh_release(n);
1243 inet_inherit_port(&tcp_hashinfo, lsk, newsk);
1244 csk_set_flag(csk, CSK_CONN_INLINE);
1245 bh_unlock_sock(newsk);
1246
1247 return newsk;
1248free_csk:
1249 chtls_sock_release(&csk->kref);
1250free_dst:
1251 if (n)
1252 neigh_release(n);
1253 dst_release(dst);
1254free_sk:
1255 inet_csk_prepare_forced_close(newsk);
1256 tcp_done(newsk);
1257free_oreq:
1258 chtls_reqsk_free(oreq);
1259 return NULL;
1260}
1261
1262
1263
1264
1265static void mk_tid_release(struct sk_buff *skb,
1266 unsigned int chan, unsigned int tid)
1267{
1268 struct cpl_tid_release *req;
1269 unsigned int len;
1270
1271 len = roundup(sizeof(struct cpl_tid_release), 16);
1272 req = (struct cpl_tid_release *)__skb_put(skb, len);
1273 memset(req, 0, len);
1274 set_wr_txq(skb, CPL_PRIORITY_SETUP, chan);
1275 INIT_TP_WR_CPL(req, CPL_TID_RELEASE, tid);
1276}
1277
1278static int chtls_get_module(struct sock *sk)
1279{
1280 struct inet_connection_sock *icsk = inet_csk(sk);
1281
1282 if (!try_module_get(icsk->icsk_ulp_ops->owner))
1283 return -1;
1284
1285 return 0;
1286}
1287
1288static void chtls_pass_accept_request(struct sock *sk,
1289 struct sk_buff *skb)
1290{
1291 struct cpl_t5_pass_accept_rpl *rpl;
1292 struct cpl_pass_accept_req *req;
1293 struct listen_ctx *listen_ctx;
1294 struct vlan_ethhdr *vlan_eh;
1295 struct request_sock *oreq;
1296 struct sk_buff *reply_skb;
1297 struct chtls_sock *csk;
1298 struct chtls_dev *cdev;
1299 struct ipv6hdr *ip6h;
1300 struct tcphdr *tcph;
1301 struct sock *newsk;
1302 struct ethhdr *eh;
1303 struct iphdr *iph;
1304 void *network_hdr;
1305 unsigned int stid;
1306 unsigned int len;
1307 unsigned int tid;
1308 bool th_ecn, ect;
1309 __u8 ip_dsfield;
1310 u16 eth_hdr_len;
1311 bool ecn_ok;
1312
1313 req = cplhdr(skb) + RSS_HDR;
1314 tid = GET_TID(req);
1315 cdev = BLOG_SKB_CB(skb)->cdev;
1316 newsk = lookup_tid(cdev->tids, tid);
1317 stid = PASS_OPEN_TID_G(ntohl(req->tos_stid));
1318 if (newsk) {
1319 pr_info("tid (%d) already in use\n", tid);
1320 return;
1321 }
1322
1323 len = roundup(sizeof(*rpl), 16);
1324 reply_skb = alloc_skb(len, GFP_ATOMIC);
1325 if (!reply_skb) {
1326 cxgb4_remove_tid(cdev->tids, 0, tid, sk->sk_family);
1327 kfree_skb(skb);
1328 return;
1329 }
1330
1331 if (sk->sk_state != TCP_LISTEN)
1332 goto reject;
1333
1334 if (inet_csk_reqsk_queue_is_full(sk))
1335 goto reject;
1336
1337 if (sk_acceptq_is_full(sk))
1338 goto reject;
1339
1340
1341 eth_hdr_len = T6_ETH_HDR_LEN_G(ntohl(req->hdr_len));
1342 if (eth_hdr_len == ETH_HLEN) {
1343 eh = (struct ethhdr *)(req + 1);
1344 iph = (struct iphdr *)(eh + 1);
1345 ip6h = (struct ipv6hdr *)(eh + 1);
1346 network_hdr = (void *)(eh + 1);
1347 } else {
1348 vlan_eh = (struct vlan_ethhdr *)(req + 1);
1349 iph = (struct iphdr *)(vlan_eh + 1);
1350 ip6h = (struct ipv6hdr *)(vlan_eh + 1);
1351 network_hdr = (void *)(vlan_eh + 1);
1352 }
1353
1354 if (iph->version == 0x4) {
1355 tcph = (struct tcphdr *)(iph + 1);
1356 skb_set_network_header(skb, (void *)iph - (void *)req);
1357 oreq = inet_reqsk_alloc(&chtls_rsk_ops, sk, true);
1358 } else {
1359 tcph = (struct tcphdr *)(ip6h + 1);
1360 skb_set_network_header(skb, (void *)ip6h - (void *)req);
1361 oreq = inet_reqsk_alloc(&chtls_rsk_opsv6, sk, false);
1362 }
1363
1364 if (!oreq)
1365 goto reject;
1366
1367 oreq->rsk_rcv_wnd = 0;
1368 oreq->rsk_window_clamp = 0;
1369 oreq->syncookie = 0;
1370 oreq->mss = 0;
1371 oreq->ts_recent = 0;
1372
1373 tcp_rsk(oreq)->tfo_listener = false;
1374 tcp_rsk(oreq)->rcv_isn = ntohl(tcph->seq);
1375 chtls_set_req_port(oreq, tcph->source, tcph->dest);
1376 if (iph->version == 0x4) {
1377 chtls_set_req_addr(oreq, iph->daddr, iph->saddr);
1378 ip_dsfield = ipv4_get_dsfield(iph);
1379#if IS_ENABLED(CONFIG_IPV6)
1380 } else {
1381 inet_rsk(oreq)->ir_v6_rmt_addr = ipv6_hdr(skb)->saddr;
1382 inet_rsk(oreq)->ir_v6_loc_addr = ipv6_hdr(skb)->daddr;
1383 ip_dsfield = ipv6_get_dsfield(ipv6_hdr(skb));
1384#endif
1385 }
1386 if (req->tcpopt.wsf <= 14 &&
1387 sock_net(sk)->ipv4.sysctl_tcp_window_scaling) {
1388 inet_rsk(oreq)->wscale_ok = 1;
1389 inet_rsk(oreq)->snd_wscale = req->tcpopt.wsf;
1390 }
1391 inet_rsk(oreq)->ir_iif = sk->sk_bound_dev_if;
1392 th_ecn = tcph->ece && tcph->cwr;
1393 if (th_ecn) {
1394 ect = !INET_ECN_is_not_ect(ip_dsfield);
1395 ecn_ok = sock_net(sk)->ipv4.sysctl_tcp_ecn;
1396 if ((!ect && ecn_ok) || tcp_ca_needs_ecn(sk))
1397 inet_rsk(oreq)->ecn_ok = 1;
1398 }
1399
1400 newsk = chtls_recv_sock(sk, oreq, network_hdr, req, cdev);
1401 if (!newsk)
1402 goto reject;
1403
1404 if (chtls_get_module(newsk))
1405 goto reject;
1406 inet_csk_reqsk_queue_added(sk);
1407 reply_skb->sk = newsk;
1408 chtls_install_cpl_ops(newsk);
1409 cxgb4_insert_tid(cdev->tids, newsk, tid, newsk->sk_family);
1410 csk = rcu_dereference_sk_user_data(newsk);
1411 listen_ctx = (struct listen_ctx *)lookup_stid(cdev->tids, stid);
1412 csk->listen_ctx = listen_ctx;
1413 __skb_queue_tail(&listen_ctx->synq, (struct sk_buff *)&csk->synq);
1414 chtls_pass_accept_rpl(reply_skb, req, tid);
1415 kfree_skb(skb);
1416 return;
1417
1418reject:
1419 mk_tid_release(reply_skb, 0, tid);
1420 cxgb4_ofld_send(cdev->lldi->ports[0], reply_skb);
1421 kfree_skb(skb);
1422}
1423
1424
1425
1426
1427static int chtls_pass_accept_req(struct chtls_dev *cdev, struct sk_buff *skb)
1428{
1429 struct cpl_pass_accept_req *req = cplhdr(skb) + RSS_HDR;
1430 struct listen_ctx *ctx;
1431 unsigned int stid;
1432 unsigned int tid;
1433 struct sock *lsk;
1434 void *data;
1435
1436 stid = PASS_OPEN_TID_G(ntohl(req->tos_stid));
1437 tid = GET_TID(req);
1438
1439 data = lookup_stid(cdev->tids, stid);
1440 if (!data)
1441 return 1;
1442
1443 ctx = (struct listen_ctx *)data;
1444 lsk = ctx->lsk;
1445
1446 if (unlikely(tid_out_of_range(cdev->tids, tid))) {
1447 pr_info("passive open TID %u too large\n", tid);
1448 return 1;
1449 }
1450
1451 BLOG_SKB_CB(skb)->cdev = cdev;
1452 process_cpl_msg(chtls_pass_accept_request, lsk, skb);
1453 return 0;
1454}
1455
1456
1457
1458
1459
1460
1461
1462static void make_established(struct sock *sk, u32 snd_isn, unsigned int opt)
1463{
1464 struct tcp_sock *tp = tcp_sk(sk);
1465
1466 tp->pushed_seq = snd_isn;
1467 tp->write_seq = snd_isn;
1468 tp->snd_nxt = snd_isn;
1469 tp->snd_una = snd_isn;
1470 inet_sk(sk)->inet_id = prandom_u32();
1471 assign_rxopt(sk, opt);
1472
1473 if (tp->rcv_wnd > (RCV_BUFSIZ_M << 10))
1474 tp->rcv_wup -= tp->rcv_wnd - (RCV_BUFSIZ_M << 10);
1475
1476 smp_mb();
1477 tcp_set_state(sk, TCP_ESTABLISHED);
1478}
1479
1480static void chtls_abort_conn(struct sock *sk, struct sk_buff *skb)
1481{
1482 struct sk_buff *abort_skb;
1483
1484 abort_skb = alloc_skb(sizeof(struct cpl_abort_req), GFP_ATOMIC);
1485 if (abort_skb)
1486 chtls_send_reset(sk, CPL_ABORT_SEND_RST, abort_skb);
1487}
1488
1489static struct sock *reap_list;
1490static DEFINE_SPINLOCK(reap_list_lock);
1491
1492
1493
1494
1495DECLARE_TASK_FUNC(process_reap_list, task_param)
1496{
1497 spin_lock_bh(&reap_list_lock);
1498 while (reap_list) {
1499 struct sock *sk = reap_list;
1500 struct chtls_sock *csk = rcu_dereference_sk_user_data(sk);
1501
1502 reap_list = csk->passive_reap_next;
1503 csk->passive_reap_next = NULL;
1504 spin_unlock(&reap_list_lock);
1505 sock_hold(sk);
1506
1507 bh_lock_sock(sk);
1508 chtls_abort_conn(sk, NULL);
1509 sock_orphan(sk);
1510 if (sk->sk_state == TCP_CLOSE)
1511 inet_csk_destroy_sock(sk);
1512 bh_unlock_sock(sk);
1513 sock_put(sk);
1514 spin_lock(&reap_list_lock);
1515 }
1516 spin_unlock_bh(&reap_list_lock);
1517}
1518
1519static DECLARE_WORK(reap_task, process_reap_list);
1520
1521static void add_to_reap_list(struct sock *sk)
1522{
1523 struct chtls_sock *csk = sk->sk_user_data;
1524
1525 local_bh_disable();
1526 release_tcp_port(sk);
1527
1528 spin_lock(&reap_list_lock);
1529 csk->passive_reap_next = reap_list;
1530 reap_list = sk;
1531 if (!csk->passive_reap_next)
1532 schedule_work(&reap_task);
1533 spin_unlock(&reap_list_lock);
1534 local_bh_enable();
1535}
1536
1537static void add_pass_open_to_parent(struct sock *child, struct sock *lsk,
1538 struct chtls_dev *cdev)
1539{
1540 struct request_sock *oreq;
1541 struct chtls_sock *csk;
1542
1543 if (lsk->sk_state != TCP_LISTEN)
1544 return;
1545
1546 csk = child->sk_user_data;
1547 oreq = csk->passive_reap_next;
1548 csk->passive_reap_next = NULL;
1549
1550 reqsk_queue_removed(&inet_csk(lsk)->icsk_accept_queue, oreq);
1551 __skb_unlink((struct sk_buff *)&csk->synq, &csk->listen_ctx->synq);
1552
1553 if (sk_acceptq_is_full(lsk)) {
1554 chtls_reqsk_free(oreq);
1555 add_to_reap_list(child);
1556 } else {
1557 refcount_set(&oreq->rsk_refcnt, 1);
1558 inet_csk_reqsk_queue_add(lsk, oreq, child);
1559 lsk->sk_data_ready(lsk);
1560 }
1561}
1562
1563static void bl_add_pass_open_to_parent(struct sock *lsk, struct sk_buff *skb)
1564{
1565 struct sock *child = skb->sk;
1566
1567 skb->sk = NULL;
1568 add_pass_open_to_parent(child, lsk, BLOG_SKB_CB(skb)->cdev);
1569 kfree_skb(skb);
1570}
1571
1572static int chtls_pass_establish(struct chtls_dev *cdev, struct sk_buff *skb)
1573{
1574 struct cpl_pass_establish *req = cplhdr(skb) + RSS_HDR;
1575 struct chtls_sock *csk;
1576 struct sock *lsk, *sk;
1577 unsigned int hwtid;
1578
1579 hwtid = GET_TID(req);
1580 sk = lookup_tid(cdev->tids, hwtid);
1581 if (!sk)
1582 return (CPL_RET_UNKNOWN_TID | CPL_RET_BUF_DONE);
1583
1584 bh_lock_sock(sk);
1585 if (unlikely(sock_owned_by_user(sk))) {
1586 kfree_skb(skb);
1587 } else {
1588 unsigned int stid;
1589 void *data;
1590
1591 csk = sk->sk_user_data;
1592 csk->wr_max_credits = 64;
1593 csk->wr_credits = 64;
1594 csk->wr_unacked = 0;
1595 make_established(sk, ntohl(req->snd_isn), ntohs(req->tcp_opt));
1596 stid = PASS_OPEN_TID_G(ntohl(req->tos_stid));
1597 sk->sk_state_change(sk);
1598 if (unlikely(sk->sk_socket))
1599 sk_wake_async(sk, 0, POLL_OUT);
1600
1601 data = lookup_stid(cdev->tids, stid);
1602 if (!data) {
1603
1604 kfree_skb(skb);
1605 goto unlock;
1606 }
1607 lsk = ((struct listen_ctx *)data)->lsk;
1608
1609 bh_lock_sock(lsk);
1610 if (unlikely(skb_queue_empty(&csk->listen_ctx->synq))) {
1611
1612 bh_unlock_sock(lsk);
1613 kfree_skb(skb);
1614 goto unlock;
1615 }
1616
1617 if (likely(!sock_owned_by_user(lsk))) {
1618 kfree_skb(skb);
1619 add_pass_open_to_parent(sk, lsk, cdev);
1620 } else {
1621 skb->sk = sk;
1622 BLOG_SKB_CB(skb)->cdev = cdev;
1623 BLOG_SKB_CB(skb)->backlog_rcv =
1624 bl_add_pass_open_to_parent;
1625 __sk_add_backlog(lsk, skb);
1626 }
1627 bh_unlock_sock(lsk);
1628 }
1629unlock:
1630 bh_unlock_sock(sk);
1631 return 0;
1632}
1633
1634
1635
1636
1637static void handle_urg_ptr(struct sock *sk, u32 urg_seq)
1638{
1639 struct tcp_sock *tp = tcp_sk(sk);
1640
1641 urg_seq--;
1642 if (tp->urg_data && !after(urg_seq, tp->urg_seq))
1643 return;
1644
1645 sk_send_sigurg(sk);
1646 if (tp->urg_seq == tp->copied_seq && tp->urg_data &&
1647 !sock_flag(sk, SOCK_URGINLINE) &&
1648 tp->copied_seq != tp->rcv_nxt) {
1649 struct sk_buff *skb = skb_peek(&sk->sk_receive_queue);
1650
1651 tp->copied_seq++;
1652 if (skb && tp->copied_seq - ULP_SKB_CB(skb)->seq >= skb->len)
1653 chtls_free_skb(sk, skb);
1654 }
1655
1656 tp->urg_data = TCP_URG_NOTYET;
1657 tp->urg_seq = urg_seq;
1658}
1659
1660static void check_sk_callbacks(struct chtls_sock *csk)
1661{
1662 struct sock *sk = csk->sk;
1663
1664 if (unlikely(sk->sk_user_data &&
1665 !csk_flag_nochk(csk, CSK_CALLBACKS_CHKD)))
1666 csk_set_flag(csk, CSK_CALLBACKS_CHKD);
1667}
1668
1669
1670
1671
1672
1673static void handle_excess_rx(struct sock *sk, struct sk_buff *skb)
1674{
1675 if (!csk_flag(sk, CSK_ABORT_SHUTDOWN))
1676 chtls_abort_conn(sk, skb);
1677
1678 kfree_skb(skb);
1679}
1680
1681static void chtls_recv_data(struct sock *sk, struct sk_buff *skb)
1682{
1683 struct cpl_rx_data *hdr = cplhdr(skb) + RSS_HDR;
1684 struct chtls_sock *csk;
1685 struct tcp_sock *tp;
1686
1687 csk = rcu_dereference_sk_user_data(sk);
1688 tp = tcp_sk(sk);
1689
1690 if (unlikely(sk->sk_shutdown & RCV_SHUTDOWN)) {
1691 handle_excess_rx(sk, skb);
1692 return;
1693 }
1694
1695 ULP_SKB_CB(skb)->seq = ntohl(hdr->seq);
1696 ULP_SKB_CB(skb)->psh = hdr->psh;
1697 skb_ulp_mode(skb) = ULP_MODE_NONE;
1698
1699 skb_reset_transport_header(skb);
1700 __skb_pull(skb, sizeof(*hdr) + RSS_HDR);
1701 if (!skb->data_len)
1702 __skb_trim(skb, ntohs(hdr->len));
1703
1704 if (unlikely(hdr->urg))
1705 handle_urg_ptr(sk, tp->rcv_nxt + ntohs(hdr->urg));
1706 if (unlikely(tp->urg_data == TCP_URG_NOTYET &&
1707 tp->urg_seq - tp->rcv_nxt < skb->len))
1708 tp->urg_data = TCP_URG_VALID |
1709 skb->data[tp->urg_seq - tp->rcv_nxt];
1710
1711 if (unlikely(hdr->dack_mode != csk->delack_mode)) {
1712 csk->delack_mode = hdr->dack_mode;
1713 csk->delack_seq = tp->rcv_nxt;
1714 }
1715
1716 tcp_hdr(skb)->fin = 0;
1717 tp->rcv_nxt += skb->len;
1718
1719 __skb_queue_tail(&sk->sk_receive_queue, skb);
1720
1721 if (!sock_flag(sk, SOCK_DEAD)) {
1722 check_sk_callbacks(csk);
1723 sk->sk_data_ready(sk);
1724 }
1725}
1726
1727static int chtls_rx_data(struct chtls_dev *cdev, struct sk_buff *skb)
1728{
1729 struct cpl_rx_data *req = cplhdr(skb) + RSS_HDR;
1730 unsigned int hwtid = GET_TID(req);
1731 struct sock *sk;
1732
1733 sk = lookup_tid(cdev->tids, hwtid);
1734 if (unlikely(!sk)) {
1735 pr_err("can't find conn. for hwtid %u.\n", hwtid);
1736 return -EINVAL;
1737 }
1738 skb_dst_set(skb, NULL);
1739 process_cpl_msg(chtls_recv_data, sk, skb);
1740 return 0;
1741}
1742
1743static void chtls_recv_pdu(struct sock *sk, struct sk_buff *skb)
1744{
1745 struct cpl_tls_data *hdr = cplhdr(skb);
1746 struct chtls_sock *csk;
1747 struct chtls_hws *tlsk;
1748 struct tcp_sock *tp;
1749
1750 csk = rcu_dereference_sk_user_data(sk);
1751 tlsk = &csk->tlshws;
1752 tp = tcp_sk(sk);
1753
1754 if (unlikely(sk->sk_shutdown & RCV_SHUTDOWN)) {
1755 handle_excess_rx(sk, skb);
1756 return;
1757 }
1758
1759 ULP_SKB_CB(skb)->seq = ntohl(hdr->seq);
1760 ULP_SKB_CB(skb)->flags = 0;
1761 skb_ulp_mode(skb) = ULP_MODE_TLS;
1762
1763 skb_reset_transport_header(skb);
1764 __skb_pull(skb, sizeof(*hdr));
1765 if (!skb->data_len)
1766 __skb_trim(skb,
1767 CPL_TLS_DATA_LENGTH_G(ntohl(hdr->length_pkd)));
1768
1769 if (unlikely(tp->urg_data == TCP_URG_NOTYET && tp->urg_seq -
1770 tp->rcv_nxt < skb->len))
1771 tp->urg_data = TCP_URG_VALID |
1772 skb->data[tp->urg_seq - tp->rcv_nxt];
1773
1774 tcp_hdr(skb)->fin = 0;
1775 tlsk->pldlen = CPL_TLS_DATA_LENGTH_G(ntohl(hdr->length_pkd));
1776 __skb_queue_tail(&tlsk->sk_recv_queue, skb);
1777}
1778
1779static int chtls_rx_pdu(struct chtls_dev *cdev, struct sk_buff *skb)
1780{
1781 struct cpl_tls_data *req = cplhdr(skb);
1782 unsigned int hwtid = GET_TID(req);
1783 struct sock *sk;
1784
1785 sk = lookup_tid(cdev->tids, hwtid);
1786 if (unlikely(!sk)) {
1787 pr_err("can't find conn. for hwtid %u.\n", hwtid);
1788 return -EINVAL;
1789 }
1790 skb_dst_set(skb, NULL);
1791 process_cpl_msg(chtls_recv_pdu, sk, skb);
1792 return 0;
1793}
1794
1795static void chtls_set_hdrlen(struct sk_buff *skb, unsigned int nlen)
1796{
1797 struct tlsrx_cmp_hdr *tls_cmp_hdr = cplhdr(skb);
1798
1799 skb->hdr_len = ntohs((__force __be16)tls_cmp_hdr->length);
1800 tls_cmp_hdr->length = ntohs((__force __be16)nlen);
1801}
1802
1803static void chtls_rx_hdr(struct sock *sk, struct sk_buff *skb)
1804{
1805 struct tlsrx_cmp_hdr *tls_hdr_pkt;
1806 struct cpl_rx_tls_cmp *cmp_cpl;
1807 struct sk_buff *skb_rec;
1808 struct chtls_sock *csk;
1809 struct chtls_hws *tlsk;
1810 struct tcp_sock *tp;
1811
1812 cmp_cpl = cplhdr(skb);
1813 csk = rcu_dereference_sk_user_data(sk);
1814 tlsk = &csk->tlshws;
1815 tp = tcp_sk(sk);
1816
1817 ULP_SKB_CB(skb)->seq = ntohl(cmp_cpl->seq);
1818 ULP_SKB_CB(skb)->flags = 0;
1819
1820 skb_reset_transport_header(skb);
1821 __skb_pull(skb, sizeof(*cmp_cpl));
1822 tls_hdr_pkt = (struct tlsrx_cmp_hdr *)skb->data;
1823 if (tls_hdr_pkt->res_to_mac_error & TLSRX_HDR_PKT_ERROR_M)
1824 tls_hdr_pkt->type = CONTENT_TYPE_ERROR;
1825 if (!skb->data_len)
1826 __skb_trim(skb, TLS_HEADER_LENGTH);
1827
1828 tp->rcv_nxt +=
1829 CPL_RX_TLS_CMP_PDULENGTH_G(ntohl(cmp_cpl->pdulength_length));
1830
1831 ULP_SKB_CB(skb)->flags |= ULPCB_FLAG_TLS_HDR;
1832 skb_rec = __skb_dequeue(&tlsk->sk_recv_queue);
1833 if (!skb_rec) {
1834 __skb_queue_tail(&sk->sk_receive_queue, skb);
1835 } else {
1836 chtls_set_hdrlen(skb, tlsk->pldlen);
1837 tlsk->pldlen = 0;
1838 __skb_queue_tail(&sk->sk_receive_queue, skb);
1839 __skb_queue_tail(&sk->sk_receive_queue, skb_rec);
1840 }
1841
1842 if (!sock_flag(sk, SOCK_DEAD)) {
1843 check_sk_callbacks(csk);
1844 sk->sk_data_ready(sk);
1845 }
1846}
1847
1848static int chtls_rx_cmp(struct chtls_dev *cdev, struct sk_buff *skb)
1849{
1850 struct cpl_rx_tls_cmp *req = cplhdr(skb);
1851 unsigned int hwtid = GET_TID(req);
1852 struct sock *sk;
1853
1854 sk = lookup_tid(cdev->tids, hwtid);
1855 if (unlikely(!sk)) {
1856 pr_err("can't find conn. for hwtid %u.\n", hwtid);
1857 return -EINVAL;
1858 }
1859 skb_dst_set(skb, NULL);
1860 process_cpl_msg(chtls_rx_hdr, sk, skb);
1861
1862 return 0;
1863}
1864
1865static void chtls_timewait(struct sock *sk)
1866{
1867 struct tcp_sock *tp = tcp_sk(sk);
1868
1869 tp->rcv_nxt++;
1870 tp->rx_opt.ts_recent_stamp = ktime_get_seconds();
1871 tp->srtt_us = 0;
1872 tcp_time_wait(sk, TCP_TIME_WAIT, 0);
1873}
1874
1875static void chtls_peer_close(struct sock *sk, struct sk_buff *skb)
1876{
1877 struct chtls_sock *csk = rcu_dereference_sk_user_data(sk);
1878
1879 if (csk_flag_nochk(csk, CSK_ABORT_RPL_PENDING))
1880 goto out;
1881
1882 sk->sk_shutdown |= RCV_SHUTDOWN;
1883 sock_set_flag(sk, SOCK_DONE);
1884
1885 switch (sk->sk_state) {
1886 case TCP_SYN_RECV:
1887 case TCP_ESTABLISHED:
1888 tcp_set_state(sk, TCP_CLOSE_WAIT);
1889 break;
1890 case TCP_FIN_WAIT1:
1891 tcp_set_state(sk, TCP_CLOSING);
1892 break;
1893 case TCP_FIN_WAIT2:
1894 chtls_release_resources(sk);
1895 if (csk_flag_nochk(csk, CSK_ABORT_RPL_PENDING))
1896 chtls_conn_done(sk);
1897 else
1898 chtls_timewait(sk);
1899 break;
1900 default:
1901 pr_info("cpl_peer_close in bad state %d\n", sk->sk_state);
1902 }
1903
1904 if (!sock_flag(sk, SOCK_DEAD)) {
1905 sk->sk_state_change(sk);
1906
1907
1908 if ((sk->sk_shutdown & SEND_SHUTDOWN) ||
1909 sk->sk_state == TCP_CLOSE)
1910 sk_wake_async(sk, SOCK_WAKE_WAITD, POLL_HUP);
1911 else
1912 sk_wake_async(sk, SOCK_WAKE_WAITD, POLL_IN);
1913 }
1914out:
1915 kfree_skb(skb);
1916}
1917
1918static void chtls_close_con_rpl(struct sock *sk, struct sk_buff *skb)
1919{
1920 struct cpl_close_con_rpl *rpl = cplhdr(skb) + RSS_HDR;
1921 struct chtls_sock *csk;
1922 struct tcp_sock *tp;
1923
1924 csk = rcu_dereference_sk_user_data(sk);
1925
1926 if (csk_flag_nochk(csk, CSK_ABORT_RPL_PENDING))
1927 goto out;
1928
1929 tp = tcp_sk(sk);
1930
1931 tp->snd_una = ntohl(rpl->snd_nxt) - 1;
1932
1933 switch (sk->sk_state) {
1934 case TCP_CLOSING:
1935 chtls_release_resources(sk);
1936 if (csk_flag_nochk(csk, CSK_ABORT_RPL_PENDING))
1937 chtls_conn_done(sk);
1938 else
1939 chtls_timewait(sk);
1940 break;
1941 case TCP_LAST_ACK:
1942 chtls_release_resources(sk);
1943 chtls_conn_done(sk);
1944 break;
1945 case TCP_FIN_WAIT1:
1946 tcp_set_state(sk, TCP_FIN_WAIT2);
1947 sk->sk_shutdown |= SEND_SHUTDOWN;
1948
1949 if (!sock_flag(sk, SOCK_DEAD))
1950 sk->sk_state_change(sk);
1951 else if (tcp_sk(sk)->linger2 < 0 &&
1952 !csk_flag_nochk(csk, CSK_ABORT_SHUTDOWN))
1953 chtls_abort_conn(sk, skb);
1954 else if (csk_flag_nochk(csk, CSK_TX_DATA_SENT))
1955 chtls_set_quiesce_ctrl(sk, 0);
1956 break;
1957 default:
1958 pr_info("close_con_rpl in bad state %d\n", sk->sk_state);
1959 }
1960out:
1961 kfree_skb(skb);
1962}
1963
1964static struct sk_buff *get_cpl_skb(struct sk_buff *skb,
1965 size_t len, gfp_t gfp)
1966{
1967 if (likely(!skb_is_nonlinear(skb) && !skb_cloned(skb))) {
1968 WARN_ONCE(skb->len < len, "skb alloc error");
1969 __skb_trim(skb, len);
1970 skb_get(skb);
1971 } else {
1972 skb = alloc_skb(len, gfp);
1973 if (skb)
1974 __skb_put(skb, len);
1975 }
1976 return skb;
1977}
1978
1979static void set_abort_rpl_wr(struct sk_buff *skb, unsigned int tid,
1980 int cmd)
1981{
1982 struct cpl_abort_rpl *rpl = cplhdr(skb);
1983
1984 INIT_TP_WR_CPL(rpl, CPL_ABORT_RPL, tid);
1985 rpl->cmd = cmd;
1986}
1987
1988static void send_defer_abort_rpl(struct chtls_dev *cdev, struct sk_buff *skb)
1989{
1990 struct cpl_abort_req_rss *req = cplhdr(skb);
1991 struct sk_buff *reply_skb;
1992
1993 reply_skb = alloc_skb(sizeof(struct cpl_abort_rpl),
1994 GFP_KERNEL | __GFP_NOFAIL);
1995 __skb_put(reply_skb, sizeof(struct cpl_abort_rpl));
1996 set_abort_rpl_wr(reply_skb, GET_TID(req),
1997 (req->status & CPL_ABORT_NO_RST));
1998 set_wr_txq(reply_skb, CPL_PRIORITY_DATA, req->status >> 1);
1999 cxgb4_ofld_send(cdev->lldi->ports[0], reply_skb);
2000 kfree_skb(skb);
2001}
2002
2003
2004
2005
2006static void t4_defer_reply(struct sk_buff *skb, struct chtls_dev *cdev,
2007 defer_handler_t handler)
2008{
2009 DEFERRED_SKB_CB(skb)->handler = handler;
2010 spin_lock_bh(&cdev->deferq.lock);
2011 __skb_queue_tail(&cdev->deferq, skb);
2012 if (skb_queue_len(&cdev->deferq) == 1)
2013 schedule_work(&cdev->deferq_task);
2014 spin_unlock_bh(&cdev->deferq.lock);
2015}
2016
2017static void chtls_send_abort_rpl(struct sock *sk, struct sk_buff *skb,
2018 struct chtls_dev *cdev,
2019 int status, int queue)
2020{
2021 struct cpl_abort_req_rss *req = cplhdr(skb) + RSS_HDR;
2022 struct sk_buff *reply_skb;
2023 struct chtls_sock *csk;
2024 unsigned int tid;
2025
2026 csk = rcu_dereference_sk_user_data(sk);
2027 tid = GET_TID(req);
2028
2029 reply_skb = get_cpl_skb(skb, sizeof(struct cpl_abort_rpl), gfp_any());
2030 if (!reply_skb) {
2031 req->status = (queue << 1) | status;
2032 t4_defer_reply(skb, cdev, send_defer_abort_rpl);
2033 return;
2034 }
2035
2036 set_abort_rpl_wr(reply_skb, tid, status);
2037 kfree_skb(skb);
2038 set_wr_txq(reply_skb, CPL_PRIORITY_DATA, queue);
2039 if (csk_conn_inline(csk)) {
2040 struct l2t_entry *e = csk->l2t_entry;
2041
2042 if (e && sk->sk_state != TCP_SYN_RECV) {
2043 cxgb4_l2t_send(csk->egress_dev, reply_skb, e);
2044 return;
2045 }
2046 }
2047 cxgb4_ofld_send(cdev->lldi->ports[0], reply_skb);
2048}
2049
2050
2051
2052
2053
2054static void bl_abort_syn_rcv(struct sock *lsk, struct sk_buff *skb)
2055{
2056 struct chtls_sock *csk;
2057 struct sock *child;
2058 int queue;
2059
2060 child = skb->sk;
2061 csk = rcu_dereference_sk_user_data(child);
2062 queue = csk->txq_idx;
2063
2064 skb->sk = NULL;
2065 chtls_send_abort_rpl(child, skb, BLOG_SKB_CB(skb)->cdev,
2066 CPL_ABORT_NO_RST, queue);
2067 do_abort_syn_rcv(child, lsk);
2068}
2069
2070static int abort_syn_rcv(struct sock *sk, struct sk_buff *skb)
2071{
2072 const struct request_sock *oreq;
2073 struct listen_ctx *listen_ctx;
2074 struct chtls_sock *csk;
2075 struct chtls_dev *cdev;
2076 struct sock *psk;
2077 void *ctx;
2078
2079 csk = sk->sk_user_data;
2080 oreq = csk->passive_reap_next;
2081 cdev = csk->cdev;
2082
2083 if (!oreq)
2084 return -1;
2085
2086 ctx = lookup_stid(cdev->tids, oreq->ts_recent);
2087 if (!ctx)
2088 return -1;
2089
2090 listen_ctx = (struct listen_ctx *)ctx;
2091 psk = listen_ctx->lsk;
2092
2093 bh_lock_sock(psk);
2094 if (!sock_owned_by_user(psk)) {
2095 int queue = csk->txq_idx;
2096
2097 chtls_send_abort_rpl(sk, skb, cdev, CPL_ABORT_NO_RST, queue);
2098 do_abort_syn_rcv(sk, psk);
2099 } else {
2100 skb->sk = sk;
2101 BLOG_SKB_CB(skb)->backlog_rcv = bl_abort_syn_rcv;
2102 __sk_add_backlog(psk, skb);
2103 }
2104 bh_unlock_sock(psk);
2105 return 0;
2106}
2107
2108static void chtls_abort_req_rss(struct sock *sk, struct sk_buff *skb)
2109{
2110 const struct cpl_abort_req_rss *req = cplhdr(skb) + RSS_HDR;
2111 struct chtls_sock *csk = sk->sk_user_data;
2112 int rst_status = CPL_ABORT_NO_RST;
2113 int queue = csk->txq_idx;
2114
2115 if (is_neg_adv(req->status)) {
2116 kfree_skb(skb);
2117 return;
2118 }
2119
2120 csk_reset_flag(csk, CSK_ABORT_REQ_RCVD);
2121
2122 if (!csk_flag_nochk(csk, CSK_ABORT_SHUTDOWN) &&
2123 !csk_flag_nochk(csk, CSK_TX_DATA_SENT)) {
2124 struct tcp_sock *tp = tcp_sk(sk);
2125
2126 if (send_tx_flowc_wr(sk, 0, tp->snd_nxt, tp->rcv_nxt) < 0)
2127 WARN_ONCE(1, "send_tx_flowc error");
2128 csk_set_flag(csk, CSK_TX_DATA_SENT);
2129 }
2130
2131 csk_set_flag(csk, CSK_ABORT_SHUTDOWN);
2132
2133 if (!csk_flag_nochk(csk, CSK_ABORT_RPL_PENDING)) {
2134 sk->sk_err = ETIMEDOUT;
2135
2136 if (!sock_flag(sk, SOCK_DEAD))
2137 sk_error_report(sk);
2138
2139 if (sk->sk_state == TCP_SYN_RECV && !abort_syn_rcv(sk, skb))
2140 return;
2141
2142 }
2143
2144 chtls_send_abort_rpl(sk, skb, BLOG_SKB_CB(skb)->cdev,
2145 rst_status, queue);
2146 chtls_release_resources(sk);
2147 chtls_conn_done(sk);
2148}
2149
2150static void chtls_abort_rpl_rss(struct sock *sk, struct sk_buff *skb)
2151{
2152 struct cpl_abort_rpl_rss *rpl = cplhdr(skb) + RSS_HDR;
2153 struct chtls_sock *csk;
2154 struct chtls_dev *cdev;
2155
2156 csk = rcu_dereference_sk_user_data(sk);
2157 cdev = csk->cdev;
2158
2159 if (csk_flag_nochk(csk, CSK_ABORT_RPL_PENDING)) {
2160 csk_reset_flag(csk, CSK_ABORT_RPL_PENDING);
2161 if (!csk_flag_nochk(csk, CSK_ABORT_REQ_RCVD)) {
2162 if (sk->sk_state == TCP_SYN_SENT) {
2163 cxgb4_remove_tid(cdev->tids,
2164 csk->port_id,
2165 GET_TID(rpl),
2166 sk->sk_family);
2167 sock_put(sk);
2168 }
2169 chtls_release_resources(sk);
2170 chtls_conn_done(sk);
2171 }
2172 }
2173 kfree_skb(skb);
2174}
2175
2176static int chtls_conn_cpl(struct chtls_dev *cdev, struct sk_buff *skb)
2177{
2178 struct cpl_peer_close *req = cplhdr(skb) + RSS_HDR;
2179 void (*fn)(struct sock *sk, struct sk_buff *skb);
2180 unsigned int hwtid = GET_TID(req);
2181 struct chtls_sock *csk;
2182 struct sock *sk;
2183 u8 opcode;
2184
2185 opcode = ((const struct rss_header *)cplhdr(skb))->opcode;
2186
2187 sk = lookup_tid(cdev->tids, hwtid);
2188 if (!sk)
2189 goto rel_skb;
2190
2191 csk = sk->sk_user_data;
2192
2193 switch (opcode) {
2194 case CPL_PEER_CLOSE:
2195 fn = chtls_peer_close;
2196 break;
2197 case CPL_CLOSE_CON_RPL:
2198 fn = chtls_close_con_rpl;
2199 break;
2200 case CPL_ABORT_REQ_RSS:
2201
2202
2203
2204
2205 BLOG_SKB_CB(skb)->cdev = csk->cdev;
2206 fn = chtls_abort_req_rss;
2207 break;
2208 case CPL_ABORT_RPL_RSS:
2209 fn = chtls_abort_rpl_rss;
2210 break;
2211 default:
2212 goto rel_skb;
2213 }
2214
2215 process_cpl_msg(fn, sk, skb);
2216 return 0;
2217
2218rel_skb:
2219 kfree_skb(skb);
2220 return 0;
2221}
2222
2223static void chtls_rx_ack(struct sock *sk, struct sk_buff *skb)
2224{
2225 struct cpl_fw4_ack *hdr = cplhdr(skb) + RSS_HDR;
2226 struct chtls_sock *csk = sk->sk_user_data;
2227 struct tcp_sock *tp = tcp_sk(sk);
2228 u32 credits = hdr->credits;
2229 u32 snd_una;
2230
2231 snd_una = ntohl(hdr->snd_una);
2232 csk->wr_credits += credits;
2233
2234 if (csk->wr_unacked > csk->wr_max_credits - csk->wr_credits)
2235 csk->wr_unacked = csk->wr_max_credits - csk->wr_credits;
2236
2237 while (credits) {
2238 struct sk_buff *pskb = csk->wr_skb_head;
2239 u32 csum;
2240
2241 if (unlikely(!pskb)) {
2242 if (csk->wr_nondata)
2243 csk->wr_nondata -= credits;
2244 break;
2245 }
2246 csum = (__force u32)pskb->csum;
2247 if (unlikely(credits < csum)) {
2248 pskb->csum = (__force __wsum)(csum - credits);
2249 break;
2250 }
2251 dequeue_wr(sk);
2252 credits -= csum;
2253 kfree_skb(pskb);
2254 }
2255 if (hdr->seq_vld & CPL_FW4_ACK_FLAGS_SEQVAL) {
2256 if (unlikely(before(snd_una, tp->snd_una))) {
2257 kfree_skb(skb);
2258 return;
2259 }
2260
2261 if (tp->snd_una != snd_una) {
2262 tp->snd_una = snd_una;
2263 tp->rcv_tstamp = tcp_time_stamp(tp);
2264 if (tp->snd_una == tp->snd_nxt &&
2265 !csk_flag_nochk(csk, CSK_TX_FAILOVER))
2266 csk_reset_flag(csk, CSK_TX_WAIT_IDLE);
2267 }
2268 }
2269
2270 if (hdr->seq_vld & CPL_FW4_ACK_FLAGS_CH) {
2271 unsigned int fclen16 = roundup(failover_flowc_wr_len, 16);
2272
2273 csk->wr_credits -= fclen16;
2274 csk_reset_flag(csk, CSK_TX_WAIT_IDLE);
2275 csk_reset_flag(csk, CSK_TX_FAILOVER);
2276 }
2277 if (skb_queue_len(&csk->txq) && chtls_push_frames(csk, 0))
2278 sk->sk_write_space(sk);
2279
2280 kfree_skb(skb);
2281}
2282
2283static int chtls_wr_ack(struct chtls_dev *cdev, struct sk_buff *skb)
2284{
2285 struct cpl_fw4_ack *rpl = cplhdr(skb) + RSS_HDR;
2286 unsigned int hwtid = GET_TID(rpl);
2287 struct sock *sk;
2288
2289 sk = lookup_tid(cdev->tids, hwtid);
2290 if (unlikely(!sk)) {
2291 pr_err("can't find conn. for hwtid %u.\n", hwtid);
2292 return -EINVAL;
2293 }
2294 process_cpl_msg(chtls_rx_ack, sk, skb);
2295
2296 return 0;
2297}
2298
2299static int chtls_set_tcb_rpl(struct chtls_dev *cdev, struct sk_buff *skb)
2300{
2301 struct cpl_set_tcb_rpl *rpl = cplhdr(skb) + RSS_HDR;
2302 unsigned int hwtid = GET_TID(rpl);
2303 struct sock *sk;
2304
2305 sk = lookup_tid(cdev->tids, hwtid);
2306
2307
2308 if (!sk)
2309 return -EINVAL;
2310
2311
2312
2313
2314 if (TCB_COOKIE_G(rpl->cookie) == TCB_FIELD_COOKIE_TFLAG)
2315 chtls_send_abort(sk, CPL_ABORT_SEND_RST, NULL);
2316
2317 kfree_skb(skb);
2318 return 0;
2319}
2320
2321chtls_handler_func chtls_handlers[NUM_CPL_CMDS] = {
2322 [CPL_PASS_OPEN_RPL] = chtls_pass_open_rpl,
2323 [CPL_CLOSE_LISTSRV_RPL] = chtls_close_listsrv_rpl,
2324 [CPL_PASS_ACCEPT_REQ] = chtls_pass_accept_req,
2325 [CPL_PASS_ESTABLISH] = chtls_pass_establish,
2326 [CPL_RX_DATA] = chtls_rx_data,
2327 [CPL_TLS_DATA] = chtls_rx_pdu,
2328 [CPL_RX_TLS_CMP] = chtls_rx_cmp,
2329 [CPL_PEER_CLOSE] = chtls_conn_cpl,
2330 [CPL_CLOSE_CON_RPL] = chtls_conn_cpl,
2331 [CPL_ABORT_REQ_RSS] = chtls_conn_cpl,
2332 [CPL_ABORT_RPL_RSS] = chtls_conn_cpl,
2333 [CPL_FW4_ACK] = chtls_wr_ack,
2334 [CPL_SET_TCB_RPL] = chtls_set_tcb_rpl,
2335};
2336