1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
24 */
25
26 /*
27 * Copyright (c) 2015, Joyent, Inc. All rights reserved.
28 * Copyright 2019 OmniOS Community Edition (OmniOSce) Association.
29 * Copyright 2022 Garrett D'Amore
30 */
31
32 #include <sys/types.h>
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/sysmacros.h>
36 #include <sys/debug.h>
37 #include <sys/cmn_err.h>
38
39 #include <sys/stropts.h>
40 #include <sys/socket.h>
41 #include <sys/socketvar.h>
42
43 #define _SUN_TPI_VERSION 2
44 #include <sys/tihdr.h>
45 #include <sys/sockio.h>
46 #include <sys/kmem_impl.h>
47
48 #include <sys/strsubr.h>
49 #include <sys/strsun.h>
50 #include <sys/ddi.h>
51 #include <netinet/in.h>
52 #include <inet/ip.h>
53
54 #include <fs/sockfs/sockcommon.h>
55 #include <fs/sockfs/sockfilter_impl.h>
56
57 #include <sys/socket_proto.h>
58
59 #include <fs/sockfs/socktpi_impl.h>
60 #include <fs/sockfs/sodirect.h>
61 #include <sys/tihdr.h>
62
63 extern int xnet_skip_checks;
64 extern int xnet_check_print;
65
66 static void so_queue_oob(struct sonode *, mblk_t *, size_t);
67
68
69 /*ARGSUSED*/
70 int
so_accept_notsupp(struct sonode * lso,int fflag,struct cred * cr,struct sonode ** nsop)71 so_accept_notsupp(struct sonode *lso, int fflag,
72 struct cred *cr, struct sonode **nsop)
73 {
74 return (EOPNOTSUPP);
75 }
76
77 /*ARGSUSED*/
78 int
so_listen_notsupp(struct sonode * so,int backlog,struct cred * cr)79 so_listen_notsupp(struct sonode *so, int backlog, struct cred *cr)
80 {
81 return (EOPNOTSUPP);
82 }
83
84 /*ARGSUSED*/
85 int
so_getsockname_notsupp(struct sonode * so,struct sockaddr * sa,socklen_t * len,struct cred * cr)86 so_getsockname_notsupp(struct sonode *so, struct sockaddr *sa,
87 socklen_t *len, struct cred *cr)
88 {
89 return (EOPNOTSUPP);
90 }
91
92 /*ARGSUSED*/
93 int
so_getpeername_notsupp(struct sonode * so,struct sockaddr * addr,socklen_t * addrlen,boolean_t accept,struct cred * cr)94 so_getpeername_notsupp(struct sonode *so, struct sockaddr *addr,
95 socklen_t *addrlen, boolean_t accept, struct cred *cr)
96 {
97 return (EOPNOTSUPP);
98 }
99
100 /*ARGSUSED*/
101 int
so_shutdown_notsupp(struct sonode * so,int how,struct cred * cr)102 so_shutdown_notsupp(struct sonode *so, int how, struct cred *cr)
103 {
104 return (EOPNOTSUPP);
105 }
106
107 /*ARGSUSED*/
108 int
so_sendmblk_notsupp(struct sonode * so,struct msghdr * msg,int fflag,struct cred * cr,mblk_t ** mpp)109 so_sendmblk_notsupp(struct sonode *so, struct msghdr *msg, int fflag,
110 struct cred *cr, mblk_t **mpp)
111 {
112 return (EOPNOTSUPP);
113 }
114
115 /*
116 * Generic Socket Ops
117 */
118
119 /* ARGSUSED */
120 int
so_init(struct sonode * so,struct sonode * pso,struct cred * cr,int flags)121 so_init(struct sonode *so, struct sonode *pso, struct cred *cr, int flags)
122 {
123 return (socket_init_common(so, pso, flags, cr));
124 }
125
126 int
so_bind(struct sonode * so,struct sockaddr * name,socklen_t namelen,int flags,struct cred * cr)127 so_bind(struct sonode *so, struct sockaddr *name, socklen_t namelen,
128 int flags, struct cred *cr)
129 {
130 int error;
131
132 SO_BLOCK_FALLBACK(so, SOP_BIND(so, name, namelen, flags, cr));
133
134 ASSERT(flags == _SOBIND_XPG4_2 || flags == _SOBIND_SOCKBSD);
135
136 /* X/Open requires this check */
137 if ((so->so_state & SS_CANTSENDMORE) && !xnet_skip_checks) {
138 if (xnet_check_print) {
139 printf("sockfs: X/Open bind state check "
140 "caused EINVAL\n");
141 }
142 error = EINVAL;
143 goto done;
144 }
145
146 /*
147 * a bind to a NULL address is interpreted as unbind. So just
148 * do the downcall.
149 */
150 if (name == NULL)
151 goto dobind;
152
153 switch (so->so_family) {
154 case AF_INET:
155 if ((size_t)namelen != sizeof (sin_t)) {
156 error = name->sa_family != so->so_family ?
157 EAFNOSUPPORT : EINVAL;
158 eprintsoline(so, error);
159 goto done;
160 }
161
162 if ((flags & _SOBIND_XPG4_2) &&
163 (name->sa_family != so->so_family)) {
164 /*
165 * This check has to be made for X/Open
166 * sockets however application failures have
167 * been observed when it is applied to
168 * all sockets.
169 */
170 error = EAFNOSUPPORT;
171 eprintsoline(so, error);
172 goto done;
173 }
174 /*
175 * Force a zero sa_family to match so_family.
176 *
177 * Some programs like inetd(8) don't set the
178 * family field. Other programs leave
179 * sin_family set to garbage - SunOS 4.X does
180 * not check the family field on a bind.
181 * We use the family field that
182 * was passed in to the socket() call.
183 */
184 name->sa_family = so->so_family;
185 break;
186
187 case AF_INET6: {
188 #ifdef DEBUG
189 sin6_t *sin6 = (sin6_t *)name;
190 #endif
191 if ((size_t)namelen != sizeof (sin6_t)) {
192 error = name->sa_family != so->so_family ?
193 EAFNOSUPPORT : EINVAL;
194 eprintsoline(so, error);
195 goto done;
196 }
197
198 if (name->sa_family != so->so_family) {
199 /*
200 * With IPv6 we require the family to match
201 * unlike in IPv4.
202 */
203 error = EAFNOSUPPORT;
204 eprintsoline(so, error);
205 goto done;
206 }
207 #ifdef DEBUG
208 /*
209 * Verify that apps don't forget to clear
210 * sin6_scope_id etc
211 */
212 if (sin6->sin6_scope_id != 0 &&
213 !IN6_IS_ADDR_LINKSCOPE(&sin6->sin6_addr)) {
214 zcmn_err(getzoneid(), CE_WARN,
215 "bind with uninitialized sin6_scope_id "
216 "(%d) on socket. Pid = %d\n",
217 (int)sin6->sin6_scope_id,
218 (int)curproc->p_pid);
219 }
220 if (sin6->__sin6_src_id != 0) {
221 zcmn_err(getzoneid(), CE_WARN,
222 "bind with uninitialized __sin6_src_id "
223 "(%d) on socket. Pid = %d\n",
224 (int)sin6->__sin6_src_id,
225 (int)curproc->p_pid);
226 }
227 #endif /* DEBUG */
228
229 break;
230 }
231 default:
232 /* Just pass the request to the protocol */
233 goto dobind;
234 }
235
236 dobind:
237 if (so->so_filter_active == 0 ||
238 (error = sof_filter_bind(so, name, &namelen, cr)) < 0) {
239 error = (*so->so_downcalls->sd_bind)
240 (so->so_proto_handle, name, namelen, cr);
241 }
242 done:
243 SO_UNBLOCK_FALLBACK(so);
244
245 return (error);
246 }
247
248 int
so_listen(struct sonode * so,int backlog,struct cred * cr)249 so_listen(struct sonode *so, int backlog, struct cred *cr)
250 {
251 int error = 0;
252
253 ASSERT(MUTEX_NOT_HELD(&so->so_lock));
254 SO_BLOCK_FALLBACK(so, SOP_LISTEN(so, backlog, cr));
255
256 if ((so)->so_filter_active == 0 ||
257 (error = sof_filter_listen(so, &backlog, cr)) < 0)
258 error = (*so->so_downcalls->sd_listen)(so->so_proto_handle,
259 backlog, cr);
260
261 SO_UNBLOCK_FALLBACK(so);
262
263 return (error);
264 }
265
266
267 int
so_connect(struct sonode * so,struct sockaddr * name,socklen_t namelen,int fflag,int flags,struct cred * cr)268 so_connect(struct sonode *so, struct sockaddr *name,
269 socklen_t namelen, int fflag, int flags, struct cred *cr)
270 {
271 int error = 0;
272 sock_connid_t id;
273
274 ASSERT(MUTEX_NOT_HELD(&so->so_lock));
275 SO_BLOCK_FALLBACK(so, SOP_CONNECT(so, name, namelen, fflag, flags, cr));
276
277 /*
278 * If there is a pending error, return error
279 * This can happen if a non blocking operation caused an error.
280 */
281
282 if (so->so_error != 0) {
283 mutex_enter(&so->so_lock);
284 error = sogeterr(so, B_TRUE);
285 mutex_exit(&so->so_lock);
286 if (error != 0)
287 goto done;
288 }
289
290 if (so->so_filter_active == 0 ||
291 (error = sof_filter_connect(so, (struct sockaddr *)name,
292 &namelen, cr)) < 0) {
293 error = (*so->so_downcalls->sd_connect)(so->so_proto_handle,
294 name, namelen, &id, cr);
295
296 if (error == EINPROGRESS)
297 error = so_wait_connected(so,
298 fflag & (FNONBLOCK|FNDELAY), id);
299 }
300 done:
301 SO_UNBLOCK_FALLBACK(so);
302 return (error);
303 }
304
305 /*ARGSUSED*/
306 int
so_accept(struct sonode * so,int fflag,struct cred * cr,struct sonode ** nsop)307 so_accept(struct sonode *so, int fflag, struct cred *cr, struct sonode **nsop)
308 {
309 int error = 0;
310 struct sonode *nso;
311
312 *nsop = NULL;
313
314 SO_BLOCK_FALLBACK(so, SOP_ACCEPT(so, fflag, cr, nsop));
315 if ((so->so_state & SS_ACCEPTCONN) == 0) {
316 SO_UNBLOCK_FALLBACK(so);
317 return ((so->so_type == SOCK_DGRAM || so->so_type == SOCK_RAW) ?
318 EOPNOTSUPP : EINVAL);
319 }
320
321 if ((error = so_acceptq_dequeue(so, (fflag & (FNONBLOCK|FNDELAY)),
322 &nso)) == 0) {
323 ASSERT(nso != NULL);
324
325 /* finish the accept */
326 if ((so->so_filter_active > 0 &&
327 (error = sof_filter_accept(nso, cr)) > 0) ||
328 (error = (*so->so_downcalls->sd_accept)(so->so_proto_handle,
329 nso->so_proto_handle, (sock_upper_handle_t)nso, cr)) != 0) {
330 (void) socket_close(nso, 0, cr);
331 socket_destroy(nso);
332 } else {
333 *nsop = nso;
334 }
335 }
336
337 SO_UNBLOCK_FALLBACK(so);
338 return (error);
339 }
340
341 int
so_sendmsg(struct sonode * so,struct nmsghdr * msg,struct uio * uiop,struct cred * cr)342 so_sendmsg(struct sonode *so, struct nmsghdr *msg, struct uio *uiop,
343 struct cred *cr)
344 {
345 int error, flags;
346 boolean_t dontblock;
347 ssize_t orig_resid;
348 mblk_t *mp;
349
350 SO_BLOCK_FALLBACK(so, SOP_SENDMSG(so, msg, uiop, cr));
351
352 flags = msg->msg_flags;
353 error = 0;
354 dontblock = (flags & MSG_DONTWAIT) ||
355 (uiop->uio_fmode & (FNONBLOCK|FNDELAY));
356
357 if (!(flags & MSG_XPG4_2) && msg->msg_controllen != 0) {
358 /*
359 * Old way of passing fd's is not supported
360 */
361 SO_UNBLOCK_FALLBACK(so);
362 return (EOPNOTSUPP);
363 }
364
365 if ((so->so_mode & SM_ATOMIC) &&
366 uiop->uio_resid > so->so_proto_props.sopp_maxpsz &&
367 so->so_proto_props.sopp_maxpsz != -1) {
368 SO_UNBLOCK_FALLBACK(so);
369 return (EMSGSIZE);
370 }
371
372 /*
373 * For atomic sends we will only do one iteration.
374 */
375 do {
376 if (so->so_state & SS_CANTSENDMORE) {
377 error = EPIPE;
378 break;
379 }
380
381 if (so->so_error != 0) {
382 mutex_enter(&so->so_lock);
383 error = sogeterr(so, B_TRUE);
384 mutex_exit(&so->so_lock);
385 if (error != 0)
386 break;
387 }
388
389 /*
390 * Send down OOB messages even if the send path is being
391 * flow controlled (assuming the protocol supports OOB data).
392 */
393 if (flags & MSG_OOB) {
394 if ((so->so_mode & SM_EXDATA) == 0) {
395 error = EOPNOTSUPP;
396 break;
397 }
398 } else if (SO_SND_FLOWCTRLD(so)) {
399 /*
400 * Need to wait until the protocol is ready to receive
401 * more data for transmission.
402 */
403 if ((error = so_snd_wait_qnotfull(so, dontblock)) != 0)
404 break;
405 }
406
407 /*
408 * Time to send data to the protocol. We either copy the
409 * data into mblks or pass the uio directly to the protocol.
410 * We decide what to do based on the available down calls.
411 */
412 if (so->so_downcalls->sd_send_uio != NULL) {
413 error = (*so->so_downcalls->sd_send_uio)
414 (so->so_proto_handle, uiop, msg, cr);
415 if (error != 0)
416 break;
417 } else {
418 /* save the resid in case of failure */
419 orig_resid = uiop->uio_resid;
420
421 if ((mp = socopyinuio(uiop,
422 so->so_proto_props.sopp_maxpsz,
423 so->so_proto_props.sopp_wroff,
424 so->so_proto_props.sopp_maxblk,
425 so->so_proto_props.sopp_tail, &error)) == NULL) {
426 break;
427 }
428 ASSERT(uiop->uio_resid >= 0);
429
430 if (so->so_filter_active > 0 &&
431 ((mp = SOF_FILTER_DATA_OUT(so, mp, msg, cr,
432 &error)) == NULL)) {
433 if (error != 0)
434 break;
435 continue;
436 }
437 error = (*so->so_downcalls->sd_send)
438 (so->so_proto_handle, mp, msg, cr);
439 if (error != 0) {
440 /*
441 * The send failed. We do not have to free the
442 * mblks, because that is the protocol's
443 * responsibility. However, uio_resid must
444 * remain accurate, so adjust that here.
445 */
446 uiop->uio_resid = orig_resid;
447 break;
448 }
449 }
450 } while (uiop->uio_resid > 0);
451
452 SO_UNBLOCK_FALLBACK(so);
453
454 return (error);
455 }
456
457 int
so_sendmblk_impl(struct sonode * so,struct nmsghdr * msg,int fflag,struct cred * cr,mblk_t ** mpp,sof_instance_t * fil,boolean_t fil_inject)458 so_sendmblk_impl(struct sonode *so, struct nmsghdr *msg, int fflag,
459 struct cred *cr, mblk_t **mpp, sof_instance_t *fil,
460 boolean_t fil_inject)
461 {
462 int error;
463 boolean_t dontblock;
464 size_t size;
465 mblk_t *mp = *mpp;
466
467 if (so->so_downcalls->sd_send == NULL)
468 return (EOPNOTSUPP);
469
470 error = 0;
471 dontblock = (msg->msg_flags & MSG_DONTWAIT) ||
472 (fflag & (FNONBLOCK|FNDELAY));
473 size = msgdsize(mp);
474
475 if ((so->so_mode & SM_ATOMIC) &&
476 size > so->so_proto_props.sopp_maxpsz &&
477 so->so_proto_props.sopp_maxpsz != -1) {
478 SO_UNBLOCK_FALLBACK(so);
479 return (EMSGSIZE);
480 }
481
482 while (mp != NULL) {
483 mblk_t *nmp, *last_mblk;
484 size_t mlen;
485
486 if (so->so_state & SS_CANTSENDMORE) {
487 error = EPIPE;
488 break;
489 }
490 if (so->so_error != 0) {
491 mutex_enter(&so->so_lock);
492 error = sogeterr(so, B_TRUE);
493 mutex_exit(&so->so_lock);
494 if (error != 0)
495 break;
496 }
497 /* Socket filters are not flow controlled */
498 if (SO_SND_FLOWCTRLD(so) && !fil_inject) {
499 /*
500 * Need to wait until the protocol is ready to receive
501 * more data for transmission.
502 */
503 if ((error = so_snd_wait_qnotfull(so, dontblock)) != 0)
504 break;
505 }
506
507 /*
508 * We only allow so_maxpsz of data to be sent down to
509 * the protocol at time.
510 */
511 mlen = MBLKL(mp);
512 nmp = mp->b_cont;
513 last_mblk = mp;
514 while (nmp != NULL) {
515 mlen += MBLKL(nmp);
516 if (mlen > so->so_proto_props.sopp_maxpsz) {
517 last_mblk->b_cont = NULL;
518 break;
519 }
520 last_mblk = nmp;
521 nmp = nmp->b_cont;
522 }
523
524 if (so->so_filter_active > 0 &&
525 (mp = SOF_FILTER_DATA_OUT_FROM(so, fil, mp, msg,
526 cr, &error)) == NULL) {
527 *mpp = mp = nmp;
528 if (error != 0)
529 break;
530 continue;
531 }
532 error = (*so->so_downcalls->sd_send)
533 (so->so_proto_handle, mp, msg, cr);
534 if (error != 0) {
535 /*
536 * The send failed. The protocol will free the mblks
537 * that were sent down. Let the caller deal with the
538 * rest.
539 */
540 *mpp = nmp;
541 break;
542 }
543
544 *mpp = mp = nmp;
545 }
546 /* Let the filter know whether the protocol is flow controlled */
547 if (fil_inject && error == 0 && SO_SND_FLOWCTRLD(so))
548 error = ENOSPC;
549
550 return (error);
551 }
552
553 int
so_sendmblk(struct sonode * so,struct nmsghdr * msg,int fflag,struct cred * cr,mblk_t ** mpp)554 so_sendmblk(struct sonode *so, struct nmsghdr *msg, int fflag,
555 struct cred *cr, mblk_t **mpp)
556 {
557 int error;
558
559 SO_BLOCK_FALLBACK(so, SOP_SENDMBLK(so, msg, fflag, cr, mpp));
560
561 error = so_sendmblk_impl(so, msg, fflag, cr, mpp, so->so_filter_top,
562 B_FALSE);
563
564 SO_UNBLOCK_FALLBACK(so);
565
566 return (error);
567 }
568
569 int
so_shutdown(struct sonode * so,int how,struct cred * cr)570 so_shutdown(struct sonode *so, int how, struct cred *cr)
571 {
572 int error = 0;
573
574 SO_BLOCK_FALLBACK(so, SOP_SHUTDOWN(so, how, cr));
575
576 /*
577 * SunOS 4.X has no check for datagram sockets.
578 * 5.X checks that it is connected (ENOTCONN)
579 * X/Open requires that we check the connected state.
580 */
581 if (!(so->so_state & SS_ISCONNECTED)) {
582 if (!xnet_skip_checks) {
583 error = ENOTCONN;
584 if (xnet_check_print) {
585 printf("sockfs: X/Open shutdown check "
586 "caused ENOTCONN\n");
587 }
588 }
589 goto done;
590 }
591
592 if (so->so_filter_active == 0 ||
593 (error = sof_filter_shutdown(so, &how, cr)) < 0)
594 error = ((*so->so_downcalls->sd_shutdown)(so->so_proto_handle,
595 how, cr));
596
597 /*
598 * Protocol agreed to shutdown. We need to flush the
599 * receive buffer if the receive side is being shutdown.
600 */
601 if (error == 0 && how != SHUT_WR) {
602 mutex_enter(&so->so_lock);
603 /* wait for active reader to finish */
604 (void) so_lock_read(so, 0);
605
606 so_rcv_flush(so);
607
608 so_unlock_read(so);
609 mutex_exit(&so->so_lock);
610 }
611
612 done:
613 SO_UNBLOCK_FALLBACK(so);
614 return (error);
615 }
616
617 int
so_getsockname(struct sonode * so,struct sockaddr * addr,socklen_t * addrlen,struct cred * cr)618 so_getsockname(struct sonode *so, struct sockaddr *addr,
619 socklen_t *addrlen, struct cred *cr)
620 {
621 int error;
622
623 SO_BLOCK_FALLBACK(so, SOP_GETSOCKNAME(so, addr, addrlen, cr));
624
625 if (so->so_filter_active == 0 ||
626 (error = sof_filter_getsockname(so, addr, addrlen, cr)) < 0)
627 error = (*so->so_downcalls->sd_getsockname)
628 (so->so_proto_handle, addr, addrlen, cr);
629
630 SO_UNBLOCK_FALLBACK(so);
631 return (error);
632 }
633
634 int
so_getpeername(struct sonode * so,struct sockaddr * addr,socklen_t * addrlen,boolean_t accept,struct cred * cr)635 so_getpeername(struct sonode *so, struct sockaddr *addr,
636 socklen_t *addrlen, boolean_t accept, struct cred *cr)
637 {
638 int error;
639
640 SO_BLOCK_FALLBACK(so, SOP_GETPEERNAME(so, addr, addrlen, accept, cr));
641
642 if (accept) {
643 error = (*so->so_downcalls->sd_getpeername)
644 (so->so_proto_handle, addr, addrlen, cr);
645 } else if (!(so->so_state & SS_ISCONNECTED)) {
646 error = ENOTCONN;
647 } else if ((so->so_state & SS_CANTSENDMORE) && !xnet_skip_checks) {
648 /* Added this check for X/Open */
649 error = EINVAL;
650 if (xnet_check_print) {
651 printf("sockfs: X/Open getpeername check => EINVAL\n");
652 }
653 } else if (so->so_filter_active == 0 ||
654 (error = sof_filter_getpeername(so, addr, addrlen, cr)) < 0) {
655 error = (*so->so_downcalls->sd_getpeername)
656 (so->so_proto_handle, addr, addrlen, cr);
657 }
658
659 SO_UNBLOCK_FALLBACK(so);
660 return (error);
661 }
662
663 int
so_getsockopt(struct sonode * so,int level,int option_name,void * optval,socklen_t * optlenp,int flags,struct cred * cr)664 so_getsockopt(struct sonode *so, int level, int option_name,
665 void *optval, socklen_t *optlenp, int flags, struct cred *cr)
666 {
667 int error = 0;
668
669 if (level == SOL_FILTER)
670 return (sof_getsockopt(so, option_name, optval, optlenp, cr));
671
672 SO_BLOCK_FALLBACK(so,
673 SOP_GETSOCKOPT(so, level, option_name, optval, optlenp, flags, cr));
674
675 if ((so->so_filter_active == 0 ||
676 (error = sof_filter_getsockopt(so, level, option_name, optval,
677 optlenp, cr)) < 0) &&
678 (error = socket_getopt_common(so, level, option_name, optval,
679 optlenp, flags)) < 0) {
680 error = (*so->so_downcalls->sd_getsockopt)
681 (so->so_proto_handle, level, option_name, optval, optlenp,
682 cr);
683 if (error == ENOPROTOOPT) {
684 if (level == SOL_SOCKET) {
685 /*
686 * If a protocol does not support a particular
687 * socket option, set can fail (not allowed)
688 * but get can not fail. This is the previous
689 * sockfs bahvior.
690 */
691 switch (option_name) {
692 case SO_LINGER:
693 if (*optlenp < (t_uscalar_t)
694 sizeof (struct linger)) {
695 error = EINVAL;
696 break;
697 }
698 error = 0;
699 bzero(optval, sizeof (struct linger));
700 *optlenp = sizeof (struct linger);
701 break;
702 case SO_RCVTIMEO:
703 case SO_SNDTIMEO:
704 if (*optlenp < (t_uscalar_t)
705 sizeof (struct timeval)) {
706 error = EINVAL;
707 break;
708 }
709 error = 0;
710 bzero(optval, sizeof (struct timeval));
711 *optlenp = sizeof (struct timeval);
712 break;
713 case SO_SND_BUFINFO:
714 if (*optlenp < (t_uscalar_t)
715 sizeof (struct so_snd_bufinfo)) {
716 error = EINVAL;
717 break;
718 }
719 error = 0;
720 bzero(optval,
721 sizeof (struct so_snd_bufinfo));
722 *optlenp =
723 sizeof (struct so_snd_bufinfo);
724 break;
725 case SO_DEBUG:
726 case SO_REUSEADDR:
727 case SO_KEEPALIVE:
728 case SO_DONTROUTE:
729 case SO_BROADCAST:
730 case SO_USELOOPBACK:
731 case SO_OOBINLINE:
732 case SO_DGRAM_ERRIND:
733 case SO_SNDBUF:
734 case SO_RCVBUF:
735 error = 0;
736 *((int32_t *)optval) = 0;
737 *optlenp = sizeof (int32_t);
738 break;
739 default:
740 break;
741 }
742 }
743 }
744 }
745
746 SO_UNBLOCK_FALLBACK(so);
747 return (error);
748 }
749
750 int
so_setsockopt(struct sonode * so,int level,int option_name,const void * optval,socklen_t optlen,struct cred * cr)751 so_setsockopt(struct sonode *so, int level, int option_name,
752 const void *optval, socklen_t optlen, struct cred *cr)
753 {
754 int error = 0;
755 struct timeval tl;
756 const void *opt = optval;
757
758 if (level == SOL_FILTER)
759 return (sof_setsockopt(so, option_name, optval, optlen, cr));
760
761 SO_BLOCK_FALLBACK(so,
762 SOP_SETSOCKOPT(so, level, option_name, optval, optlen, cr));
763
764 /* X/Open requires this check */
765 if (so->so_state & SS_CANTSENDMORE && !xnet_skip_checks) {
766 SO_UNBLOCK_FALLBACK(so);
767 if (xnet_check_print)
768 printf("sockfs: X/Open setsockopt check => EINVAL\n");
769 return (EINVAL);
770 }
771
772 if (so->so_filter_active > 0 &&
773 (error = sof_filter_setsockopt(so, level, option_name,
774 (void *)optval, &optlen, cr)) >= 0)
775 goto done;
776
777 if (level == SOL_SOCKET) {
778 switch (option_name) {
779 case SO_RCVTIMEO:
780 case SO_SNDTIMEO: {
781 /*
782 * We pass down these two options to protocol in order
783 * to support some third part protocols which need to
784 * know them. For those protocols which don't care
785 * these two options, simply return 0.
786 */
787 clock_t t_usec;
788
789 if (get_udatamodel() == DATAMODEL_NONE ||
790 get_udatamodel() == DATAMODEL_NATIVE) {
791 if (optlen != sizeof (struct timeval)) {
792 error = EINVAL;
793 goto done;
794 }
795 bcopy((struct timeval *)optval, &tl,
796 sizeof (struct timeval));
797 } else {
798 if (optlen != sizeof (struct timeval32)) {
799 error = EINVAL;
800 goto done;
801 }
802 TIMEVAL32_TO_TIMEVAL(&tl,
803 (struct timeval32 *)optval);
804 }
805 opt = &tl;
806 optlen = sizeof (tl);
807 t_usec = tl.tv_sec * 1000 * 1000 + tl.tv_usec;
808 mutex_enter(&so->so_lock);
809 if (option_name == SO_RCVTIMEO)
810 so->so_rcvtimeo = drv_usectohz(t_usec);
811 else
812 so->so_sndtimeo = drv_usectohz(t_usec);
813 mutex_exit(&so->so_lock);
814 break;
815 }
816 case SO_RCVBUF:
817 /*
818 * XXX XPG 4.2 applications retrieve SO_RCVBUF from
819 * sockfs since the transport might adjust the value
820 * and not return exactly what was set by the
821 * application.
822 */
823 so->so_xpg_rcvbuf = *(int32_t *)optval;
824 break;
825 }
826 }
827 error = (*so->so_downcalls->sd_setsockopt)
828 (so->so_proto_handle, level, option_name, opt, optlen, cr);
829 done:
830 SO_UNBLOCK_FALLBACK(so);
831 return (error);
832 }
833
834 int
so_ioctl(struct sonode * so,int cmd,intptr_t arg,int mode,struct cred * cr,int32_t * rvalp)835 so_ioctl(struct sonode *so, int cmd, intptr_t arg, int mode,
836 struct cred *cr, int32_t *rvalp)
837 {
838 int error = 0;
839
840 SO_BLOCK_FALLBACK(so, SOP_IOCTL(so, cmd, arg, mode, cr, rvalp));
841
842 /*
843 * If there is a pending error, return error
844 * This can happen if a non blocking operation caused an error.
845 */
846 if (so->so_error != 0) {
847 mutex_enter(&so->so_lock);
848 error = sogeterr(so, B_TRUE);
849 mutex_exit(&so->so_lock);
850 if (error != 0)
851 goto done;
852 }
853
854 /*
855 * calling strioc can result in the socket falling back to TPI,
856 * if that is supported.
857 */
858 if ((so->so_filter_active == 0 ||
859 (error = sof_filter_ioctl(so, cmd, arg, mode,
860 rvalp, cr)) < 0) &&
861 (error = socket_ioctl_common(so, cmd, arg, mode, cr, rvalp)) < 0 &&
862 (error = socket_strioc_common(so, cmd, arg, mode, cr, rvalp)) < 0) {
863 error = (*so->so_downcalls->sd_ioctl)(so->so_proto_handle,
864 cmd, arg, mode, rvalp, cr);
865 }
866
867 done:
868 SO_UNBLOCK_FALLBACK(so);
869
870 return (error);
871 }
872
873 int
so_poll(struct sonode * so,short events,int anyyet,short * reventsp,struct pollhead ** phpp)874 so_poll(struct sonode *so, short events, int anyyet, short *reventsp,
875 struct pollhead **phpp)
876 {
877 int state = so->so_state, mask;
878 *reventsp = 0;
879
880 /*
881 * In sockets the errors are represented as input/output events
882 */
883 if (so->so_error != 0 &&
884 ((POLLIN|POLLRDNORM|POLLOUT) & events) != 0) {
885 *reventsp = (POLLIN|POLLRDNORM|POLLOUT) & events;
886 return (0);
887 }
888
889 /*
890 * If the socket is in a state where it can send data
891 * turn on POLLWRBAND and POLLOUT events.
892 */
893 if ((so->so_mode & SM_CONNREQUIRED) == 0 || (state & SS_ISCONNECTED)) {
894 /*
895 * out of band data is allowed even if the connection
896 * is flow controlled
897 */
898 *reventsp |= POLLWRBAND & events;
899 if (!SO_SND_FLOWCTRLD(so)) {
900 /*
901 * As long as there is buffer to send data
902 * turn on POLLOUT events
903 */
904 *reventsp |= POLLOUT & events;
905 }
906 }
907
908 /*
909 * Turn on POLLIN whenever there is data on the receive queue,
910 * or the socket is in a state where no more data will be received.
911 * Also, if the socket is accepting connections, flip the bit if
912 * there is something on the queue.
913 *
914 * We do an initial check for events without holding locks. However,
915 * if there are no event available, then we redo the check for POLLIN
916 * events under the lock.
917 */
918
919 /* Pending connections */
920 if (!list_is_empty(&so->so_acceptq_list))
921 *reventsp |= (POLLIN|POLLRDNORM) & events;
922
923 /*
924 * If we're looking for POLLRDHUP, indicate it if we have sent the
925 * last rx signal for the socket.
926 */
927 if ((events & POLLRDHUP) && (state & SS_SENTLASTREADSIG))
928 *reventsp |= POLLRDHUP;
929
930 /* Data */
931 /* so_downcalls is null for sctp */
932 if (so->so_downcalls != NULL && so->so_downcalls->sd_poll != NULL) {
933 *reventsp |= (*so->so_downcalls->sd_poll)
934 (so->so_proto_handle, events & SO_PROTO_POLLEV, anyyet,
935 CRED()) & events;
936 ASSERT((*reventsp & ~events) == 0);
937 /* do not recheck events */
938 events &= ~SO_PROTO_POLLEV;
939 } else {
940 if (SO_HAVE_DATA(so))
941 *reventsp |= (POLLIN|POLLRDNORM) & events;
942
943 /* Urgent data */
944 if ((state & SS_OOBPEND) != 0) {
945 *reventsp |= (POLLRDBAND | POLLPRI) & events;
946 }
947
948 /*
949 * If the socket has become disconnected, we set POLLHUP.
950 * Note that if we are in this state, we will have set POLLIN
951 * (SO_HAVE_DATA() is true on a disconnected socket), but not
952 * POLLOUT (SS_ISCONNECTED is false). This is in keeping with
953 * the semantics of POLLHUP, which is defined to be mutually
954 * exclusive with respect to POLLOUT but not POLLIN. We are
955 * therefore setting POLLHUP primarily for the benefit of
956 * those not polling on POLLIN, as they have no other way of
957 * knowing that the socket has been disconnected.
958 */
959 mask = SS_SENTLASTREADSIG | SS_SENTLASTWRITESIG;
960
961 if ((state & (mask | SS_ISCONNECTED)) == mask)
962 *reventsp |= POLLHUP;
963 }
964
965 if ((!*reventsp && !anyyet) || (events & POLLET)) {
966 /* Check for read events again, but this time under lock */
967 if (events & (POLLIN|POLLRDNORM)) {
968 mutex_enter(&so->so_lock);
969 if (SO_HAVE_DATA(so) ||
970 !list_is_empty(&so->so_acceptq_list)) {
971 if (events & POLLET) {
972 so->so_pollev |= SO_POLLEV_IN;
973 *phpp = &so->so_poll_list;
974 }
975
976 mutex_exit(&so->so_lock);
977 *reventsp |= (POLLIN|POLLRDNORM) & events;
978
979 return (0);
980 } else {
981 so->so_pollev |= SO_POLLEV_IN;
982 mutex_exit(&so->so_lock);
983 }
984 }
985 *phpp = &so->so_poll_list;
986 }
987 return (0);
988 }
989
990 /*
991 * Generic Upcalls
992 */
993 void
so_connected(sock_upper_handle_t sock_handle,sock_connid_t id,cred_t * peer_cred,pid_t peer_cpid)994 so_connected(sock_upper_handle_t sock_handle, sock_connid_t id,
995 cred_t *peer_cred, pid_t peer_cpid)
996 {
997 struct sonode *so = (struct sonode *)sock_handle;
998
999 mutex_enter(&so->so_lock);
1000 ASSERT(so->so_proto_handle != NULL);
1001
1002 if (peer_cred != NULL) {
1003 if (so->so_peercred != NULL)
1004 crfree(so->so_peercred);
1005 crhold(peer_cred);
1006 so->so_peercred = peer_cred;
1007 so->so_cpid = peer_cpid;
1008 }
1009
1010 so->so_proto_connid = id;
1011 soisconnected(so);
1012 /*
1013 * Wake ones who're waiting for conn to become established.
1014 */
1015 so_notify_connected(so);
1016 }
1017
1018 int
so_disconnected(sock_upper_handle_t sock_handle,sock_connid_t id,int error)1019 so_disconnected(sock_upper_handle_t sock_handle, sock_connid_t id, int error)
1020 {
1021 struct sonode *so = (struct sonode *)sock_handle;
1022 boolean_t connect_failed;
1023
1024 mutex_enter(&so->so_lock);
1025
1026 /*
1027 * If we aren't currently connected, then this isn't a disconnect but
1028 * rather a failure to connect.
1029 */
1030 connect_failed = !(so->so_state & SS_ISCONNECTED);
1031
1032 so->so_proto_connid = id;
1033 soisdisconnected(so, error);
1034 so_notify_disconnected(so, connect_failed, error);
1035
1036 return (0);
1037 }
1038
1039 void
so_opctl(sock_upper_handle_t sock_handle,sock_opctl_action_t action,uintptr_t arg)1040 so_opctl(sock_upper_handle_t sock_handle, sock_opctl_action_t action,
1041 uintptr_t arg)
1042 {
1043 struct sonode *so = (struct sonode *)sock_handle;
1044
1045 switch (action) {
1046 case SOCK_OPCTL_SHUT_SEND:
1047 mutex_enter(&so->so_lock);
1048 socantsendmore(so);
1049 so_notify_disconnecting(so);
1050 break;
1051 case SOCK_OPCTL_SHUT_RECV: {
1052 mutex_enter(&so->so_lock);
1053 socantrcvmore(so);
1054 so_notify_eof(so);
1055 break;
1056 }
1057 case SOCK_OPCTL_ENAB_ACCEPT:
1058 mutex_enter(&so->so_lock);
1059 so->so_state |= SS_ACCEPTCONN;
1060 so->so_backlog = (unsigned int)arg;
1061 /*
1062 * The protocol can stop generating newconn upcalls when
1063 * the backlog is full, so to make sure the listener does
1064 * not end up with a queue full of deferred connections
1065 * we reduce the backlog by one. Thus the listener will
1066 * start closing deferred connections before the backlog
1067 * is full.
1068 */
1069 if (so->so_filter_active > 0)
1070 so->so_backlog = MAX(1, so->so_backlog - 1);
1071 mutex_exit(&so->so_lock);
1072 break;
1073 default:
1074 ASSERT(0);
1075 break;
1076 }
1077 }
1078
1079 void
so_txq_full(sock_upper_handle_t sock_handle,boolean_t qfull)1080 so_txq_full(sock_upper_handle_t sock_handle, boolean_t qfull)
1081 {
1082 struct sonode *so = (struct sonode *)sock_handle;
1083
1084 if (qfull) {
1085 so_snd_qfull(so);
1086 } else {
1087 so_snd_qnotfull(so);
1088 mutex_enter(&so->so_lock);
1089 /* so_notify_writable drops so_lock */
1090 so_notify_writable(so);
1091 }
1092 }
1093
1094 sock_upper_handle_t
so_newconn(sock_upper_handle_t parenthandle,sock_lower_handle_t proto_handle,sock_downcalls_t * sock_downcalls,struct cred * peer_cred,pid_t peer_cpid,sock_upcalls_t ** sock_upcallsp)1095 so_newconn(sock_upper_handle_t parenthandle,
1096 sock_lower_handle_t proto_handle, sock_downcalls_t *sock_downcalls,
1097 struct cred *peer_cred, pid_t peer_cpid, sock_upcalls_t **sock_upcallsp)
1098 {
1099 struct sonode *so = (struct sonode *)parenthandle;
1100 struct sonode *nso;
1101 int error;
1102
1103 ASSERT(proto_handle != NULL);
1104
1105 if ((so->so_state & SS_ACCEPTCONN) == 0 ||
1106 (so->so_acceptq_len >= so->so_backlog &&
1107 (so->so_filter_active == 0 || !sof_sonode_drop_deferred(so)))) {
1108 return (NULL);
1109 }
1110
1111 nso = socket_newconn(so, proto_handle, sock_downcalls, SOCKET_NOSLEEP,
1112 &error);
1113 if (nso == NULL)
1114 return (NULL);
1115
1116 if (peer_cred != NULL) {
1117 crhold(peer_cred);
1118 nso->so_peercred = peer_cred;
1119 nso->so_cpid = peer_cpid;
1120 }
1121 nso->so_listener = so;
1122
1123 /*
1124 * The new socket (nso), proto_handle and sock_upcallsp are all
1125 * valid at this point. But as soon as nso is placed in the accept
1126 * queue that can no longer be assumed (since an accept() thread may
1127 * pull it off the queue and close the socket).
1128 */
1129 *sock_upcallsp = &so_upcalls;
1130
1131 mutex_enter(&so->so_acceptq_lock);
1132 if (so->so_state & (SS_CLOSING|SS_FALLBACK_PENDING|SS_FALLBACK_COMP)) {
1133 mutex_exit(&so->so_acceptq_lock);
1134 ASSERT(nso->so_count == 1);
1135 nso->so_count--;
1136 nso->so_listener = NULL;
1137 /* drop proto ref */
1138 VN_RELE(SOTOV(nso));
1139 socket_destroy(nso);
1140 return (NULL);
1141 } else {
1142 so->so_acceptq_len++;
1143 if (nso->so_state & SS_FIL_DEFER) {
1144 list_insert_tail(&so->so_acceptq_defer, nso);
1145 mutex_exit(&so->so_acceptq_lock);
1146 } else {
1147 list_insert_tail(&so->so_acceptq_list, nso);
1148 cv_signal(&so->so_acceptq_cv);
1149 mutex_exit(&so->so_acceptq_lock);
1150 mutex_enter(&so->so_lock);
1151 so_notify_newconn(so);
1152 }
1153
1154 return ((sock_upper_handle_t)nso);
1155 }
1156 }
1157
1158 void
so_set_prop(sock_upper_handle_t sock_handle,struct sock_proto_props * soppp)1159 so_set_prop(sock_upper_handle_t sock_handle, struct sock_proto_props *soppp)
1160 {
1161 struct sonode *so;
1162
1163 so = (struct sonode *)sock_handle;
1164
1165 mutex_enter(&so->so_lock);
1166
1167 if (soppp->sopp_flags & SOCKOPT_MAXBLK)
1168 so->so_proto_props.sopp_maxblk = soppp->sopp_maxblk;
1169 if (soppp->sopp_flags & SOCKOPT_WROFF)
1170 so->so_proto_props.sopp_wroff = soppp->sopp_wroff;
1171 if (soppp->sopp_flags & SOCKOPT_TAIL)
1172 so->so_proto_props.sopp_tail = soppp->sopp_tail;
1173 if (soppp->sopp_flags & SOCKOPT_RCVHIWAT)
1174 so->so_proto_props.sopp_rxhiwat = soppp->sopp_rxhiwat;
1175 if (soppp->sopp_flags & SOCKOPT_RCVLOWAT)
1176 so->so_proto_props.sopp_rxlowat = soppp->sopp_rxlowat;
1177 if (soppp->sopp_flags & SOCKOPT_MAXPSZ)
1178 so->so_proto_props.sopp_maxpsz = soppp->sopp_maxpsz;
1179 if (soppp->sopp_flags & SOCKOPT_MINPSZ)
1180 so->so_proto_props.sopp_minpsz = soppp->sopp_minpsz;
1181 if (soppp->sopp_flags & SOCKOPT_ZCOPY) {
1182 if (soppp->sopp_zcopyflag & ZCVMSAFE) {
1183 so->so_proto_props.sopp_zcopyflag |= STZCVMSAFE;
1184 so->so_proto_props.sopp_zcopyflag &= ~STZCVMUNSAFE;
1185 } else if (soppp->sopp_zcopyflag & ZCVMUNSAFE) {
1186 so->so_proto_props.sopp_zcopyflag |= STZCVMUNSAFE;
1187 so->so_proto_props.sopp_zcopyflag &= ~STZCVMSAFE;
1188 }
1189
1190 if (soppp->sopp_zcopyflag & COPYCACHED) {
1191 so->so_proto_props.sopp_zcopyflag |= STRCOPYCACHED;
1192 }
1193 }
1194 if (soppp->sopp_flags & SOCKOPT_OOBINLINE)
1195 so->so_proto_props.sopp_oobinline = soppp->sopp_oobinline;
1196 if (soppp->sopp_flags & SOCKOPT_RCVTIMER)
1197 so->so_proto_props.sopp_rcvtimer = soppp->sopp_rcvtimer;
1198 if (soppp->sopp_flags & SOCKOPT_RCVTHRESH)
1199 so->so_proto_props.sopp_rcvthresh = soppp->sopp_rcvthresh;
1200 if (soppp->sopp_flags & SOCKOPT_MAXADDRLEN)
1201 so->so_proto_props.sopp_maxaddrlen = soppp->sopp_maxaddrlen;
1202 if (soppp->sopp_flags & SOCKOPT_LOOPBACK)
1203 so->so_proto_props.sopp_loopback = soppp->sopp_loopback;
1204
1205 mutex_exit(&so->so_lock);
1206
1207 if (so->so_filter_active > 0) {
1208 sof_instance_t *inst;
1209 ssize_t maxblk;
1210 ushort_t wroff, tail;
1211 maxblk = so->so_proto_props.sopp_maxblk;
1212 wroff = so->so_proto_props.sopp_wroff;
1213 tail = so->so_proto_props.sopp_tail;
1214 for (inst = so->so_filter_bottom; inst != NULL;
1215 inst = inst->sofi_prev) {
1216 if (SOF_INTERESTED(inst, mblk_prop)) {
1217 (*inst->sofi_ops->sofop_mblk_prop)(
1218 (sof_handle_t)inst, inst->sofi_cookie,
1219 &maxblk, &wroff, &tail);
1220 }
1221 }
1222 mutex_enter(&so->so_lock);
1223 so->so_proto_props.sopp_maxblk = maxblk;
1224 so->so_proto_props.sopp_wroff = wroff;
1225 so->so_proto_props.sopp_tail = tail;
1226 mutex_exit(&so->so_lock);
1227 }
1228 #ifdef DEBUG
1229 soppp->sopp_flags &= ~(SOCKOPT_MAXBLK | SOCKOPT_WROFF | SOCKOPT_TAIL |
1230 SOCKOPT_RCVHIWAT | SOCKOPT_RCVLOWAT | SOCKOPT_MAXPSZ |
1231 SOCKOPT_ZCOPY | SOCKOPT_OOBINLINE | SOCKOPT_RCVTIMER |
1232 SOCKOPT_RCVTHRESH | SOCKOPT_MAXADDRLEN | SOCKOPT_MINPSZ |
1233 SOCKOPT_LOOPBACK);
1234 ASSERT(soppp->sopp_flags == 0);
1235 #endif
1236 }
1237
1238 /* ARGSUSED */
1239 ssize_t
so_queue_msg_impl(struct sonode * so,mblk_t * mp,size_t msg_size,int flags,int * errorp,boolean_t * force_pushp,sof_instance_t * filter)1240 so_queue_msg_impl(struct sonode *so, mblk_t *mp,
1241 size_t msg_size, int flags, int *errorp, boolean_t *force_pushp,
1242 sof_instance_t *filter)
1243 {
1244 boolean_t force_push = B_TRUE;
1245 int space_left;
1246 sodirect_t *sodp = so->so_direct;
1247
1248 ASSERT(errorp != NULL);
1249 *errorp = 0;
1250 if (mp == NULL) {
1251 if (so->so_downcalls->sd_recv_uio != NULL) {
1252 mutex_enter(&so->so_lock);
1253 /* the notify functions will drop the lock */
1254 if (flags & MSG_OOB)
1255 so_notify_oobdata(so, IS_SO_OOB_INLINE(so));
1256 else
1257 so_notify_data(so, msg_size);
1258 return (0);
1259 }
1260 ASSERT(msg_size == 0);
1261 mutex_enter(&so->so_lock);
1262 goto space_check;
1263 }
1264
1265 ASSERT(mp->b_next == NULL);
1266 ASSERT(DB_TYPE(mp) == M_DATA || DB_TYPE(mp) == M_PROTO);
1267 ASSERT(msg_size == msgdsize(mp));
1268
1269 if (DB_TYPE(mp) == M_PROTO && !__TPI_PRIM_ISALIGNED(mp->b_rptr)) {
1270 /* The read pointer is not aligned correctly for TPI */
1271 zcmn_err(getzoneid(), CE_WARN,
1272 "sockfs: Unaligned TPI message received. rptr = %p\n",
1273 (void *)mp->b_rptr);
1274 freemsg(mp);
1275 mutex_enter(&so->so_lock);
1276 if (sodp != NULL)
1277 SOD_UIOAFINI(sodp);
1278 goto space_check;
1279 }
1280
1281 if (so->so_filter_active > 0) {
1282 for (; filter != NULL; filter = filter->sofi_prev) {
1283 if (!SOF_INTERESTED(filter, data_in))
1284 continue;
1285 mp = (*filter->sofi_ops->sofop_data_in)(
1286 (sof_handle_t)filter, filter->sofi_cookie, mp,
1287 flags, &msg_size);
1288 ASSERT(msgdsize(mp) == msg_size);
1289 DTRACE_PROBE2(filter__data, (sof_instance_t), filter,
1290 (mblk_t *), mp);
1291 /* Data was consumed/dropped, just do space check */
1292 if (msg_size == 0) {
1293 mutex_enter(&so->so_lock);
1294 goto space_check;
1295 }
1296 }
1297 }
1298
1299 mutex_enter(&so->so_lock);
1300 if (so->so_krecv_cb != NULL) {
1301 boolean_t cont;
1302 so_krecv_f func = so->so_krecv_cb;
1303 void *arg = so->so_krecv_arg;
1304
1305 mutex_exit(&so->so_lock);
1306 cont = func(so, mp, msg_size, flags & MSG_OOB, arg);
1307 mutex_enter(&so->so_lock);
1308 if (cont == B_TRUE) {
1309 space_left = so->so_rcvbuf;
1310 } else {
1311 so->so_rcv_queued = so->so_rcvlowat;
1312 *errorp = ENOSPC;
1313 space_left = -1;
1314 }
1315 goto done_unlock;
1316 }
1317 mutex_exit(&so->so_lock);
1318
1319 if (flags & MSG_OOB) {
1320 so_queue_oob(so, mp, msg_size);
1321 mutex_enter(&so->so_lock);
1322 goto space_check;
1323 }
1324
1325 if (force_pushp != NULL)
1326 force_push = *force_pushp;
1327
1328 mutex_enter(&so->so_lock);
1329 if (so->so_state & (SS_FALLBACK_DRAIN | SS_FALLBACK_COMP)) {
1330 if (sodp != NULL)
1331 SOD_DISABLE(sodp);
1332 mutex_exit(&so->so_lock);
1333 *errorp = EOPNOTSUPP;
1334 return (-1);
1335 }
1336 if (so->so_state & (SS_CANTRCVMORE | SS_CLOSING)) {
1337 freemsg(mp);
1338 if (sodp != NULL)
1339 SOD_DISABLE(sodp);
1340 mutex_exit(&so->so_lock);
1341 return (0);
1342 }
1343
1344 /* process the mblk via I/OAT if capable */
1345 if (sodp != NULL && sodp->sod_enabled) {
1346 if (DB_TYPE(mp) == M_DATA) {
1347 sod_uioa_mblk_init(sodp, mp, msg_size);
1348 } else {
1349 SOD_UIOAFINI(sodp);
1350 }
1351 }
1352
1353 if (mp->b_next == NULL) {
1354 so_enqueue_msg(so, mp, msg_size);
1355 } else {
1356 do {
1357 mblk_t *nmp;
1358
1359 if ((nmp = mp->b_next) != NULL) {
1360 mp->b_next = NULL;
1361 }
1362 so_enqueue_msg(so, mp, msgdsize(mp));
1363 mp = nmp;
1364 } while (mp != NULL);
1365 }
1366
1367 space_left = so->so_rcvbuf - so->so_rcv_queued;
1368 if (space_left <= 0) {
1369 so->so_flowctrld = B_TRUE;
1370 *errorp = ENOSPC;
1371 space_left = -1;
1372 }
1373
1374 if (force_push || so->so_rcv_queued >= so->so_rcv_thresh ||
1375 so->so_rcv_queued >= so->so_rcv_wanted) {
1376 SOCKET_TIMER_CANCEL(so);
1377 /*
1378 * so_notify_data will release the lock
1379 */
1380 so_notify_data(so, so->so_rcv_queued);
1381
1382 if (force_pushp != NULL)
1383 *force_pushp = B_TRUE;
1384 goto done;
1385 } else if (so->so_rcv_timer_tid == 0) {
1386 /* Make sure the recv push timer is running */
1387 SOCKET_TIMER_START(so);
1388 }
1389
1390 done_unlock:
1391 mutex_exit(&so->so_lock);
1392 done:
1393 return (space_left);
1394
1395 space_check:
1396 space_left = so->so_rcvbuf - so->so_rcv_queued;
1397 if (space_left <= 0) {
1398 so->so_flowctrld = B_TRUE;
1399 *errorp = ENOSPC;
1400 space_left = -1;
1401 }
1402 goto done_unlock;
1403 }
1404
1405 ssize_t
so_queue_msg(sock_upper_handle_t sock_handle,mblk_t * mp,size_t msg_size,int flags,int * errorp,boolean_t * force_pushp)1406 so_queue_msg(sock_upper_handle_t sock_handle, mblk_t *mp,
1407 size_t msg_size, int flags, int *errorp, boolean_t *force_pushp)
1408 {
1409 struct sonode *so = (struct sonode *)sock_handle;
1410
1411 return (so_queue_msg_impl(so, mp, msg_size, flags, errorp, force_pushp,
1412 so->so_filter_bottom));
1413 }
1414
1415 /*
1416 * Set the offset of where the oob data is relative to the bytes in
1417 * queued. Also generate SIGURG
1418 */
1419 void
so_signal_oob(sock_upper_handle_t sock_handle,ssize_t offset)1420 so_signal_oob(sock_upper_handle_t sock_handle, ssize_t offset)
1421 {
1422 struct sonode *so;
1423
1424 ASSERT(offset >= 0);
1425 so = (struct sonode *)sock_handle;
1426 mutex_enter(&so->so_lock);
1427 if (so->so_direct != NULL)
1428 SOD_UIOAFINI(so->so_direct);
1429
1430 /*
1431 * New urgent data on the way so forget about any old
1432 * urgent data.
1433 */
1434 so->so_state &= ~(SS_HAVEOOBDATA|SS_HADOOBDATA);
1435
1436 /*
1437 * Record that urgent data is pending.
1438 */
1439 so->so_state |= SS_OOBPEND;
1440
1441 if (so->so_oobmsg != NULL) {
1442 dprintso(so, 1, ("sock: discarding old oob\n"));
1443 freemsg(so->so_oobmsg);
1444 so->so_oobmsg = NULL;
1445 }
1446
1447 /*
1448 * set the offset where the urgent byte is
1449 */
1450 so->so_oobmark = so->so_rcv_queued + offset;
1451 if (so->so_oobmark == 0)
1452 so->so_state |= SS_RCVATMARK;
1453 else
1454 so->so_state &= ~SS_RCVATMARK;
1455
1456 so_notify_oobsig(so);
1457 }
1458
1459 /*
1460 * Queue the OOB byte
1461 */
1462 static void
so_queue_oob(struct sonode * so,mblk_t * mp,size_t len)1463 so_queue_oob(struct sonode *so, mblk_t *mp, size_t len)
1464 {
1465 mutex_enter(&so->so_lock);
1466 if (so->so_direct != NULL)
1467 SOD_UIOAFINI(so->so_direct);
1468
1469 ASSERT(mp != NULL);
1470 if (!IS_SO_OOB_INLINE(so)) {
1471 so->so_oobmsg = mp;
1472 so->so_state |= SS_HAVEOOBDATA;
1473 } else {
1474 so_enqueue_msg(so, mp, len);
1475 }
1476
1477 so_notify_oobdata(so, IS_SO_OOB_INLINE(so));
1478 }
1479
1480 int
so_close(struct sonode * so,int flag,struct cred * cr)1481 so_close(struct sonode *so, int flag, struct cred *cr)
1482 {
1483 int error;
1484
1485 /*
1486 * No new data will be enqueued once the CLOSING flag is set.
1487 */
1488 mutex_enter(&so->so_lock);
1489 so->so_state |= SS_CLOSING;
1490 ASSERT(so_verify_oobstate(so));
1491 so_rcv_flush(so);
1492 mutex_exit(&so->so_lock);
1493
1494 if (so->so_filter_active > 0)
1495 sof_sonode_closing(so);
1496
1497 if (so->so_state & SS_ACCEPTCONN) {
1498 /*
1499 * We grab and release the accept lock to ensure that any
1500 * thread about to insert a socket in so_newconn completes
1501 * before we flush the queue. Any thread calling so_newconn
1502 * after we drop the lock will observe the SS_CLOSING flag,
1503 * which will stop it from inserting the socket in the queue.
1504 */
1505 mutex_enter(&so->so_acceptq_lock);
1506 mutex_exit(&so->so_acceptq_lock);
1507
1508 so_acceptq_flush(so, B_TRUE);
1509 }
1510
1511 error = (*so->so_downcalls->sd_close)(so->so_proto_handle, flag, cr);
1512 switch (error) {
1513 default:
1514 /* Protocol made a synchronous close; remove proto ref */
1515 VN_RELE(SOTOV(so));
1516 break;
1517 case EINPROGRESS:
1518 /*
1519 * Protocol is in the process of closing, it will make a
1520 * 'closed' upcall to remove the reference.
1521 */
1522 error = 0;
1523 break;
1524 }
1525
1526 return (error);
1527 }
1528
1529 /*
1530 * Upcall made by the protocol when it's doing an asynchronous close. It
1531 * will drop the protocol's reference on the socket.
1532 */
1533 void
so_closed(sock_upper_handle_t sock_handle)1534 so_closed(sock_upper_handle_t sock_handle)
1535 {
1536 struct sonode *so = (struct sonode *)sock_handle;
1537
1538 VN_RELE(SOTOV(so));
1539 }
1540
1541 vnode_t *
so_get_vnode(sock_upper_handle_t sock_handle)1542 so_get_vnode(sock_upper_handle_t sock_handle)
1543 {
1544 sonode_t *so = (sonode_t *)sock_handle;
1545 vnode_t *vn;
1546
1547 vn = SOTOV(so);
1548 VN_HOLD(vn);
1549
1550 return (vn);
1551 }
1552
1553 void
so_zcopy_notify(sock_upper_handle_t sock_handle)1554 so_zcopy_notify(sock_upper_handle_t sock_handle)
1555 {
1556 struct sonode *so = (struct sonode *)sock_handle;
1557
1558 mutex_enter(&so->so_lock);
1559 so->so_copyflag |= STZCNOTIFY;
1560 cv_broadcast(&so->so_copy_cv);
1561 mutex_exit(&so->so_lock);
1562 }
1563
1564 void
so_set_error(sock_upper_handle_t sock_handle,int error)1565 so_set_error(sock_upper_handle_t sock_handle, int error)
1566 {
1567 struct sonode *so = (struct sonode *)sock_handle;
1568
1569 mutex_enter(&so->so_lock);
1570
1571 soseterror(so, error);
1572
1573 so_notify_error(so);
1574 }
1575
1576 /*
1577 * so_recvmsg - read data from the socket
1578 *
1579 * There are two ways of obtaining data; either we ask the protocol to
1580 * copy directly into the supplied buffer, or we copy data from the
1581 * sonode's receive queue. The decision which one to use depends on
1582 * whether the protocol has a sd_recv_uio down call.
1583 */
1584 int
so_recvmsg(struct sonode * so,struct nmsghdr * msg,struct uio * uiop,struct cred * cr)1585 so_recvmsg(struct sonode *so, struct nmsghdr *msg, struct uio *uiop,
1586 struct cred *cr)
1587 {
1588 rval_t rval;
1589 int flags = 0;
1590 t_uscalar_t controllen, namelen;
1591 int error = 0;
1592 int ret;
1593 mblk_t *mctlp = NULL;
1594 union T_primitives *tpr;
1595 void *control;
1596 ssize_t saved_resid;
1597 struct uio *suiop;
1598
1599 SO_BLOCK_FALLBACK(so, SOP_RECVMSG(so, msg, uiop, cr));
1600
1601 if ((so->so_state & (SS_ISCONNECTED|SS_CANTRCVMORE)) == 0 &&
1602 (so->so_mode & SM_CONNREQUIRED)) {
1603 SO_UNBLOCK_FALLBACK(so);
1604 return (ENOTCONN);
1605 }
1606
1607 mutex_enter(&so->so_lock);
1608 if (so->so_krecv_cb != NULL) {
1609 mutex_exit(&so->so_lock);
1610 return (EOPNOTSUPP);
1611 }
1612 mutex_exit(&so->so_lock);
1613
1614 if (msg->msg_flags & MSG_PEEK)
1615 msg->msg_flags &= ~MSG_WAITALL;
1616
1617 if (so->so_mode & SM_ATOMIC)
1618 msg->msg_flags |= MSG_TRUNC;
1619
1620 if (msg->msg_flags & MSG_OOB) {
1621 if ((so->so_mode & SM_EXDATA) == 0) {
1622 error = EOPNOTSUPP;
1623 } else if (so->so_downcalls->sd_recv_uio != NULL) {
1624 error = (*so->so_downcalls->sd_recv_uio)
1625 (so->so_proto_handle, uiop, msg, cr);
1626 } else {
1627 error = sorecvoob(so, msg, uiop, msg->msg_flags,
1628 IS_SO_OOB_INLINE(so));
1629 }
1630 SO_UNBLOCK_FALLBACK(so);
1631 return (error);
1632 }
1633
1634 /*
1635 * If the protocol has the recv down call, then pass the request
1636 * down.
1637 */
1638 if (so->so_downcalls->sd_recv_uio != NULL) {
1639 error = (*so->so_downcalls->sd_recv_uio)
1640 (so->so_proto_handle, uiop, msg, cr);
1641 SO_UNBLOCK_FALLBACK(so);
1642 return (error);
1643 }
1644
1645 /*
1646 * Reading data from the socket buffer
1647 */
1648 flags = msg->msg_flags;
1649 msg->msg_flags = 0;
1650
1651 /*
1652 * Set msg_controllen and msg_namelen to zero here to make it
1653 * simpler in the cases that no control or name is returned.
1654 */
1655 controllen = msg->msg_controllen;
1656 namelen = msg->msg_namelen;
1657 msg->msg_controllen = 0;
1658 msg->msg_namelen = 0;
1659
1660 mutex_enter(&so->so_lock);
1661 /* Set SOREADLOCKED */
1662 error = so_lock_read_intr(so,
1663 uiop->uio_fmode | ((flags & MSG_DONTWAIT) ? FNONBLOCK : 0));
1664 mutex_exit(&so->so_lock);
1665 if (error) {
1666 SO_UNBLOCK_FALLBACK(so);
1667 return (error);
1668 }
1669
1670 suiop = sod_rcv_init(so, flags, &uiop);
1671 retry:
1672 saved_resid = uiop->uio_resid;
1673 error = so_dequeue_msg(so, &mctlp, uiop, &rval, flags);
1674 if (error != 0) {
1675 goto out;
1676 }
1677 /*
1678 * For datagrams the MOREDATA flag is used to set MSG_TRUNC.
1679 * For non-datagrams MOREDATA is used to set MSG_EOR.
1680 */
1681 ASSERT(!(rval.r_val1 & MORECTL));
1682 if ((rval.r_val1 & MOREDATA) && (so->so_mode & SM_ATOMIC))
1683 msg->msg_flags |= MSG_TRUNC;
1684 if (mctlp == NULL) {
1685 dprintso(so, 1, ("so_recvmsg: got M_DATA\n"));
1686
1687 mutex_enter(&so->so_lock);
1688 /* Set MSG_EOR based on MOREDATA */
1689 if (!(rval.r_val1 & MOREDATA)) {
1690 if (so->so_state & SS_SAVEDEOR) {
1691 msg->msg_flags |= MSG_EOR;
1692 so->so_state &= ~SS_SAVEDEOR;
1693 }
1694 }
1695 /*
1696 * If some data was received (i.e. not EOF) and the
1697 * read/recv* has not been satisfied wait for some more.
1698 */
1699 if ((flags & MSG_WAITALL) && !(msg->msg_flags & MSG_EOR) &&
1700 uiop->uio_resid != saved_resid && uiop->uio_resid > 0) {
1701 mutex_exit(&so->so_lock);
1702 flags |= MSG_NOMARK;
1703 goto retry;
1704 }
1705
1706 goto out_locked;
1707 }
1708 /* so_queue_msg has already verified length and alignment */
1709 tpr = (union T_primitives *)mctlp->b_rptr;
1710 dprintso(so, 1, ("so_recvmsg: type %d\n", tpr->type));
1711 switch (tpr->type) {
1712 case T_DATA_IND: {
1713 /*
1714 * Set msg_flags to MSG_EOR based on
1715 * MORE_flag and MOREDATA.
1716 */
1717 mutex_enter(&so->so_lock);
1718 so->so_state &= ~SS_SAVEDEOR;
1719 if (!(tpr->data_ind.MORE_flag & 1)) {
1720 if (!(rval.r_val1 & MOREDATA))
1721 msg->msg_flags |= MSG_EOR;
1722 else
1723 so->so_state |= SS_SAVEDEOR;
1724 }
1725 freemsg(mctlp);
1726 /*
1727 * If some data was received (i.e. not EOF) and the
1728 * read/recv* has not been satisfied wait for some more.
1729 */
1730 if ((flags & MSG_WAITALL) && !(msg->msg_flags & MSG_EOR) &&
1731 uiop->uio_resid != saved_resid && uiop->uio_resid > 0) {
1732 mutex_exit(&so->so_lock);
1733 flags |= MSG_NOMARK;
1734 goto retry;
1735 }
1736 goto out_locked;
1737 }
1738 case T_UNITDATA_IND: {
1739 void *addr;
1740 t_uscalar_t addrlen;
1741 void *abuf;
1742 t_uscalar_t optlen;
1743 void *opt;
1744
1745 if (namelen != 0) {
1746 /* Caller wants source address */
1747 addrlen = tpr->unitdata_ind.SRC_length;
1748 addr = sogetoff(mctlp, tpr->unitdata_ind.SRC_offset,
1749 addrlen, 1);
1750 if (addr == NULL) {
1751 freemsg(mctlp);
1752 error = EPROTO;
1753 eprintsoline(so, error);
1754 goto out;
1755 }
1756 ASSERT(so->so_family != AF_UNIX);
1757 }
1758 optlen = tpr->unitdata_ind.OPT_length;
1759 if (optlen != 0) {
1760 t_uscalar_t ncontrollen;
1761
1762 /*
1763 * Extract any source address option.
1764 * Determine how large cmsg buffer is needed.
1765 */
1766 opt = sogetoff(mctlp, tpr->unitdata_ind.OPT_offset,
1767 optlen, __TPI_ALIGN_SIZE);
1768
1769 if (opt == NULL) {
1770 freemsg(mctlp);
1771 error = EPROTO;
1772 eprintsoline(so, error);
1773 goto out;
1774 }
1775 if (so->so_family == AF_UNIX)
1776 so_getopt_srcaddr(opt, optlen, &addr, &addrlen);
1777 ncontrollen = so_cmsglen(mctlp, opt, optlen,
1778 !(flags & MSG_XPG4_2));
1779 if (controllen != 0)
1780 controllen = ncontrollen;
1781 else if (ncontrollen != 0)
1782 msg->msg_flags |= MSG_CTRUNC;
1783 } else {
1784 controllen = 0;
1785 }
1786
1787 if (namelen != 0) {
1788 /*
1789 * Return address to caller.
1790 * Caller handles truncation if length
1791 * exceeds msg_namelen.
1792 * NOTE: AF_UNIX NUL termination is ensured by
1793 * the sender's copyin_name().
1794 */
1795 abuf = kmem_alloc(addrlen, KM_SLEEP);
1796
1797 bcopy(addr, abuf, addrlen);
1798 msg->msg_name = abuf;
1799 msg->msg_namelen = addrlen;
1800 }
1801
1802 if (controllen != 0) {
1803 /*
1804 * Return control msg to caller.
1805 * Caller handles truncation if length
1806 * exceeds msg_controllen.
1807 */
1808 control = kmem_zalloc(controllen, KM_SLEEP);
1809
1810 error = so_opt2cmsg(mctlp, opt, optlen, flags, control,
1811 controllen);
1812 if (error) {
1813 freemsg(mctlp);
1814 if (msg->msg_namelen != 0)
1815 kmem_free(msg->msg_name,
1816 msg->msg_namelen);
1817 kmem_free(control, controllen);
1818 eprintsoline(so, error);
1819 goto out;
1820 }
1821 msg->msg_control = control;
1822 msg->msg_controllen = controllen;
1823 }
1824
1825 freemsg(mctlp);
1826 goto out;
1827 }
1828 case T_OPTDATA_IND: {
1829 struct T_optdata_req *tdr;
1830 void *opt;
1831 t_uscalar_t optlen;
1832
1833 tdr = (struct T_optdata_req *)mctlp->b_rptr;
1834 optlen = tdr->OPT_length;
1835 if (optlen != 0) {
1836 t_uscalar_t ncontrollen;
1837 /*
1838 * Determine how large cmsg buffer is needed.
1839 */
1840 opt = sogetoff(mctlp,
1841 tpr->optdata_ind.OPT_offset, optlen,
1842 __TPI_ALIGN_SIZE);
1843
1844 if (opt == NULL) {
1845 freemsg(mctlp);
1846 error = EPROTO;
1847 eprintsoline(so, error);
1848 goto out;
1849 }
1850
1851 ncontrollen = so_cmsglen(mctlp, opt, optlen,
1852 !(flags & MSG_XPG4_2));
1853 if (controllen != 0)
1854 controllen = ncontrollen;
1855 else if (ncontrollen != 0)
1856 msg->msg_flags |= MSG_CTRUNC;
1857 } else {
1858 controllen = 0;
1859 }
1860
1861 if (controllen != 0) {
1862 /*
1863 * Return control msg to caller.
1864 * Caller handles truncation if length
1865 * exceeds msg_controllen.
1866 */
1867 control = kmem_zalloc(controllen, KM_SLEEP);
1868
1869 error = so_opt2cmsg(mctlp, opt, optlen, flags, control,
1870 controllen);
1871 if (error) {
1872 freemsg(mctlp);
1873 kmem_free(control, controllen);
1874 eprintsoline(so, error);
1875 goto out;
1876 }
1877 msg->msg_control = control;
1878 msg->msg_controllen = controllen;
1879 }
1880
1881 /*
1882 * Set msg_flags to MSG_EOR based on
1883 * DATA_flag and MOREDATA.
1884 */
1885 mutex_enter(&so->so_lock);
1886 so->so_state &= ~SS_SAVEDEOR;
1887 if (!(tpr->data_ind.MORE_flag & 1)) {
1888 if (!(rval.r_val1 & MOREDATA))
1889 msg->msg_flags |= MSG_EOR;
1890 else
1891 so->so_state |= SS_SAVEDEOR;
1892 }
1893 freemsg(mctlp);
1894 /*
1895 * If some data was received (i.e. not EOF) and the
1896 * read/recv* has not been satisfied wait for some more.
1897 * Not possible to wait if control info was received.
1898 */
1899 if ((flags & MSG_WAITALL) && !(msg->msg_flags & MSG_EOR) &&
1900 controllen == 0 &&
1901 uiop->uio_resid != saved_resid && uiop->uio_resid > 0) {
1902 mutex_exit(&so->so_lock);
1903 flags |= MSG_NOMARK;
1904 goto retry;
1905 }
1906 goto out_locked;
1907 }
1908 default:
1909 cmn_err(CE_CONT, "so_recvmsg bad type %x \n",
1910 tpr->type);
1911 freemsg(mctlp);
1912 error = EPROTO;
1913 ASSERT(0);
1914 }
1915 out:
1916 mutex_enter(&so->so_lock);
1917 out_locked:
1918 ret = sod_rcv_done(so, suiop, uiop);
1919 if (ret != 0 && error == 0)
1920 error = ret;
1921
1922 so_unlock_read(so); /* Clear SOREADLOCKED */
1923 mutex_exit(&so->so_lock);
1924
1925 SO_UNBLOCK_FALLBACK(so);
1926
1927 return (error);
1928 }
1929
1930 sonodeops_t so_sonodeops = {
1931 so_init, /* sop_init */
1932 so_accept, /* sop_accept */
1933 so_bind, /* sop_bind */
1934 so_listen, /* sop_listen */
1935 so_connect, /* sop_connect */
1936 so_recvmsg, /* sop_recvmsg */
1937 so_sendmsg, /* sop_sendmsg */
1938 so_sendmblk, /* sop_sendmblk */
1939 so_getpeername, /* sop_getpeername */
1940 so_getsockname, /* sop_getsockname */
1941 so_shutdown, /* sop_shutdown */
1942 so_getsockopt, /* sop_getsockopt */
1943 so_setsockopt, /* sop_setsockopt */
1944 so_ioctl, /* sop_ioctl */
1945 so_poll, /* sop_poll */
1946 so_close, /* sop_close */
1947 };
1948
1949 sock_upcalls_t so_upcalls = {
1950 so_newconn,
1951 so_connected,
1952 so_disconnected,
1953 so_opctl,
1954 so_queue_msg,
1955 so_set_prop,
1956 so_txq_full,
1957 so_signal_oob,
1958 so_zcopy_notify,
1959 so_set_error,
1960 so_closed,
1961 so_get_vnode
1962 };
1963