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) 2014, Joyent, Inc. All rights reserved.
28 */
29
30 #include <sys/types.h>
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/sysmacros.h>
34 #include <sys/debug.h>
35 #include <sys/cmn_err.h>
36
37 #include <sys/stropts.h>
38 #include <sys/socket.h>
39 #include <sys/socketvar.h>
40
41 #define _SUN_TPI_VERSION 2
42 #include <sys/tihdr.h>
43 #include <sys/sockio.h>
44 #include <sys/kmem_impl.h>
45
46 #include <sys/strsubr.h>
47 #include <sys/strsun.h>
48 #include <sys/ddi.h>
49 #include <netinet/in.h>
50 #include <inet/ip.h>
51
52 #include <fs/sockfs/sockcommon.h>
53 #include <fs/sockfs/sockfilter_impl.h>
54
55 #include <sys/socket_proto.h>
56
57 #include <fs/sockfs/socktpi_impl.h>
58 #include <fs/sockfs/sodirect.h>
59 #include <sys/tihdr.h>
60 #include <fs/sockfs/nl7c.h>
61
62 extern int xnet_skip_checks;
63 extern int xnet_check_print;
64
65 static void so_queue_oob(struct sonode *, mblk_t *, size_t);
66
67
68 /*ARGSUSED*/
69 int
so_accept_notsupp(struct sonode * lso,int fflag,struct cred * cr,struct sonode ** nsop)70 so_accept_notsupp(struct sonode *lso, int fflag,
71 struct cred *cr, struct sonode **nsop)
72 {
73 return (EOPNOTSUPP);
74 }
75
76 /*ARGSUSED*/
77 int
so_listen_notsupp(struct sonode * so,int backlog,struct cred * cr)78 so_listen_notsupp(struct sonode *so, int backlog, struct cred *cr)
79 {
80 return (EOPNOTSUPP);
81 }
82
83 /*ARGSUSED*/
84 int
so_getsockname_notsupp(struct sonode * so,struct sockaddr * sa,socklen_t * len,struct cred * cr)85 so_getsockname_notsupp(struct sonode *so, struct sockaddr *sa,
86 socklen_t *len, struct cred *cr)
87 {
88 return (EOPNOTSUPP);
89 }
90
91 /*ARGSUSED*/
92 int
so_getpeername_notsupp(struct sonode * so,struct sockaddr * addr,socklen_t * addrlen,boolean_t accept,struct cred * cr)93 so_getpeername_notsupp(struct sonode *so, struct sockaddr *addr,
94 socklen_t *addrlen, boolean_t accept, struct cred *cr)
95 {
96 return (EOPNOTSUPP);
97 }
98
99 /*ARGSUSED*/
100 int
so_shutdown_notsupp(struct sonode * so,int how,struct cred * cr)101 so_shutdown_notsupp(struct sonode *so, int how, struct cred *cr)
102 {
103 return (EOPNOTSUPP);
104 }
105
106 /*ARGSUSED*/
107 int
so_sendmblk_notsupp(struct sonode * so,struct msghdr * msg,int fflag,struct cred * cr,mblk_t ** mpp)108 so_sendmblk_notsupp(struct sonode *so, struct msghdr *msg, int fflag,
109 struct cred *cr, mblk_t **mpp)
110 {
111 return (EOPNOTSUPP);
112 }
113
114 /*
115 * Generic Socket Ops
116 */
117
118 /* ARGSUSED */
119 int
so_init(struct sonode * so,struct sonode * pso,struct cred * cr,int flags)120 so_init(struct sonode *so, struct sonode *pso, struct cred *cr, int flags)
121 {
122 return (socket_init_common(so, pso, flags, cr));
123 }
124
125 int
so_bind(struct sonode * so,struct sockaddr * name,socklen_t namelen,int flags,struct cred * cr)126 so_bind(struct sonode *so, struct sockaddr *name, socklen_t namelen,
127 int flags, struct cred *cr)
128 {
129 int error;
130
131 SO_BLOCK_FALLBACK(so, SOP_BIND(so, name, namelen, flags, cr));
132
133 ASSERT(flags == _SOBIND_XPG4_2 || flags == _SOBIND_SOCKBSD);
134
135 /* X/Open requires this check */
136 if ((so->so_state & SS_CANTSENDMORE) && !xnet_skip_checks) {
137 if (xnet_check_print) {
138 printf("sockfs: X/Open bind state check "
139 "caused EINVAL\n");
140 }
141 error = EINVAL;
142 goto done;
143 }
144
145 /*
146 * a bind to a NULL address is interpreted as unbind. So just
147 * do the downcall.
148 */
149 if (name == NULL)
150 goto dobind;
151
152 switch (so->so_family) {
153 case AF_INET:
154 if ((size_t)namelen != sizeof (sin_t)) {
155 error = name->sa_family != so->so_family ?
156 EAFNOSUPPORT : EINVAL;
157 eprintsoline(so, error);
158 goto done;
159 }
160
161 if ((flags & _SOBIND_XPG4_2) &&
162 (name->sa_family != so->so_family)) {
163 /*
164 * This check has to be made for X/Open
165 * sockets however application failures have
166 * been observed when it is applied to
167 * all sockets.
168 */
169 error = EAFNOSUPPORT;
170 eprintsoline(so, error);
171 goto done;
172 }
173 /*
174 * Force a zero sa_family to match so_family.
175 *
176 * Some programs like inetd(1M) don't set the
177 * family field. Other programs leave
178 * sin_family set to garbage - SunOS 4.X does
179 * not check the family field on a bind.
180 * We use the family field that
181 * was passed in to the socket() call.
182 */
183 name->sa_family = so->so_family;
184 break;
185
186 case AF_INET6: {
187 #ifdef DEBUG
188 sin6_t *sin6 = (sin6_t *)name;
189 #endif
190 if ((size_t)namelen != sizeof (sin6_t)) {
191 error = name->sa_family != so->so_family ?
192 EAFNOSUPPORT : EINVAL;
193 eprintsoline(so, error);
194 goto done;
195 }
196
197 if (name->sa_family != so->so_family) {
198 /*
199 * With IPv6 we require the family to match
200 * unlike in IPv4.
201 */
202 error = EAFNOSUPPORT;
203 eprintsoline(so, error);
204 goto done;
205 }
206 #ifdef DEBUG
207 /*
208 * Verify that apps don't forget to clear
209 * sin6_scope_id etc
210 */
211 if (sin6->sin6_scope_id != 0 &&
212 !IN6_IS_ADDR_LINKSCOPE(&sin6->sin6_addr)) {
213 zcmn_err(getzoneid(), CE_WARN,
214 "bind with uninitialized sin6_scope_id "
215 "(%d) on socket. Pid = %d\n",
216 (int)sin6->sin6_scope_id,
217 (int)curproc->p_pid);
218 }
219 if (sin6->__sin6_src_id != 0) {
220 zcmn_err(getzoneid(), CE_WARN,
221 "bind with uninitialized __sin6_src_id "
222 "(%d) on socket. Pid = %d\n",
223 (int)sin6->__sin6_src_id,
224 (int)curproc->p_pid);
225 }
226 #endif /* DEBUG */
227
228 break;
229 }
230 default:
231 /* Just pass the request to the protocol */
232 goto dobind;
233 }
234
235 /*
236 * First we check if either NCA or KSSL has been enabled for
237 * the requested address, and if so, we fall back to TPI.
238 * If neither of those two services are enabled, then we just
239 * pass the request to the protocol.
240 *
241 * Note that KSSL can only be enabled on a socket if NCA is NOT
242 * enabled for that socket, hence the else-statement below.
243 */
244 if (nl7c_enabled && ((so->so_family == AF_INET ||
245 so->so_family == AF_INET6) &&
246 nl7c_lookup_addr(name, namelen) != NULL)) {
247 /*
248 * NL7C is not supported in non-global zones,
249 * we enforce this restriction here.
250 */
251 if (so->so_zoneid == GLOBAL_ZONEID) {
252 /* NCA should be used, so fall back to TPI */
253 error = so_tpi_fallback(so, cr);
254 SO_UNBLOCK_FALLBACK(so);
255 if (error)
256 return (error);
257 else
258 return (SOP_BIND(so, name, namelen, flags, cr));
259 }
260 }
261
262 dobind:
263 if (so->so_filter_active == 0 ||
264 (error = sof_filter_bind(so, name, &namelen, cr)) < 0) {
265 error = (*so->so_downcalls->sd_bind)
266 (so->so_proto_handle, name, namelen, cr);
267 }
268 done:
269 SO_UNBLOCK_FALLBACK(so);
270
271 return (error);
272 }
273
274 int
so_listen(struct sonode * so,int backlog,struct cred * cr)275 so_listen(struct sonode *so, int backlog, struct cred *cr)
276 {
277 int error = 0;
278
279 ASSERT(MUTEX_NOT_HELD(&so->so_lock));
280 SO_BLOCK_FALLBACK(so, SOP_LISTEN(so, backlog, cr));
281
282 if ((so)->so_filter_active == 0 ||
283 (error = sof_filter_listen(so, &backlog, cr)) < 0)
284 error = (*so->so_downcalls->sd_listen)(so->so_proto_handle,
285 backlog, cr);
286
287 SO_UNBLOCK_FALLBACK(so);
288
289 return (error);
290 }
291
292
293 int
so_connect(struct sonode * so,struct sockaddr * name,socklen_t namelen,int fflag,int flags,struct cred * cr)294 so_connect(struct sonode *so, struct sockaddr *name,
295 socklen_t namelen, int fflag, int flags, struct cred *cr)
296 {
297 int error = 0;
298 sock_connid_t id;
299
300 ASSERT(MUTEX_NOT_HELD(&so->so_lock));
301 SO_BLOCK_FALLBACK(so, SOP_CONNECT(so, name, namelen, fflag, flags, cr));
302
303 /*
304 * If there is a pending error, return error
305 * This can happen if a non blocking operation caused an error.
306 */
307
308 if (so->so_error != 0) {
309 mutex_enter(&so->so_lock);
310 error = sogeterr(so, B_TRUE);
311 mutex_exit(&so->so_lock);
312 if (error != 0)
313 goto done;
314 }
315
316 if (so->so_filter_active == 0 ||
317 (error = sof_filter_connect(so, (struct sockaddr *)name,
318 &namelen, cr)) < 0) {
319 error = (*so->so_downcalls->sd_connect)(so->so_proto_handle,
320 name, namelen, &id, cr);
321
322 if (error == EINPROGRESS)
323 error = so_wait_connected(so,
324 fflag & (FNONBLOCK|FNDELAY), id);
325 }
326 done:
327 SO_UNBLOCK_FALLBACK(so);
328 return (error);
329 }
330
331 /*ARGSUSED*/
332 int
so_accept(struct sonode * so,int fflag,struct cred * cr,struct sonode ** nsop)333 so_accept(struct sonode *so, int fflag, struct cred *cr, struct sonode **nsop)
334 {
335 int error = 0;
336 struct sonode *nso;
337
338 *nsop = NULL;
339
340 SO_BLOCK_FALLBACK(so, SOP_ACCEPT(so, fflag, cr, nsop));
341 if ((so->so_state & SS_ACCEPTCONN) == 0) {
342 SO_UNBLOCK_FALLBACK(so);
343 return ((so->so_type == SOCK_DGRAM || so->so_type == SOCK_RAW) ?
344 EOPNOTSUPP : EINVAL);
345 }
346
347 if ((error = so_acceptq_dequeue(so, (fflag & (FNONBLOCK|FNDELAY)),
348 &nso)) == 0) {
349 ASSERT(nso != NULL);
350
351 /* finish the accept */
352 if ((so->so_filter_active > 0 &&
353 (error = sof_filter_accept(nso, cr)) > 0) ||
354 (error = (*so->so_downcalls->sd_accept)(so->so_proto_handle,
355 nso->so_proto_handle, (sock_upper_handle_t)nso, cr)) != 0) {
356 (void) socket_close(nso, 0, cr);
357 socket_destroy(nso);
358 } else {
359 *nsop = nso;
360 }
361 }
362
363 SO_UNBLOCK_FALLBACK(so);
364 return (error);
365 }
366
367 int
so_sendmsg(struct sonode * so,struct nmsghdr * msg,struct uio * uiop,struct cred * cr)368 so_sendmsg(struct sonode *so, struct nmsghdr *msg, struct uio *uiop,
369 struct cred *cr)
370 {
371 int error, flags;
372 boolean_t dontblock;
373 ssize_t orig_resid;
374 mblk_t *mp;
375
376 SO_BLOCK_FALLBACK(so, SOP_SENDMSG(so, msg, uiop, cr));
377
378 flags = msg->msg_flags;
379 error = 0;
380 dontblock = (flags & MSG_DONTWAIT) ||
381 (uiop->uio_fmode & (FNONBLOCK|FNDELAY));
382
383 if (!(flags & MSG_XPG4_2) && msg->msg_controllen != 0) {
384 /*
385 * Old way of passing fd's is not supported
386 */
387 SO_UNBLOCK_FALLBACK(so);
388 return (EOPNOTSUPP);
389 }
390
391 if ((so->so_mode & SM_ATOMIC) &&
392 uiop->uio_resid > so->so_proto_props.sopp_maxpsz &&
393 so->so_proto_props.sopp_maxpsz != -1) {
394 SO_UNBLOCK_FALLBACK(so);
395 return (EMSGSIZE);
396 }
397
398 /*
399 * For atomic sends we will only do one iteration.
400 */
401 do {
402 if (so->so_state & SS_CANTSENDMORE) {
403 error = EPIPE;
404 break;
405 }
406
407 if (so->so_error != 0) {
408 mutex_enter(&so->so_lock);
409 error = sogeterr(so, B_TRUE);
410 mutex_exit(&so->so_lock);
411 if (error != 0)
412 break;
413 }
414
415 /*
416 * Send down OOB messages even if the send path is being
417 * flow controlled (assuming the protocol supports OOB data).
418 */
419 if (flags & MSG_OOB) {
420 if ((so->so_mode & SM_EXDATA) == 0) {
421 error = EOPNOTSUPP;
422 break;
423 }
424 } else if (SO_SND_FLOWCTRLD(so)) {
425 /*
426 * Need to wait until the protocol is ready to receive
427 * more data for transmission.
428 */
429 if ((error = so_snd_wait_qnotfull(so, dontblock)) != 0)
430 break;
431 }
432
433 /*
434 * Time to send data to the protocol. We either copy the
435 * data into mblks or pass the uio directly to the protocol.
436 * We decide what to do based on the available down calls.
437 */
438 if (so->so_downcalls->sd_send_uio != NULL) {
439 error = (*so->so_downcalls->sd_send_uio)
440 (so->so_proto_handle, uiop, msg, cr);
441 if (error != 0)
442 break;
443 } else {
444 /* save the resid in case of failure */
445 orig_resid = uiop->uio_resid;
446
447 if ((mp = socopyinuio(uiop,
448 so->so_proto_props.sopp_maxpsz,
449 so->so_proto_props.sopp_wroff,
450 so->so_proto_props.sopp_maxblk,
451 so->so_proto_props.sopp_tail, &error)) == NULL) {
452 break;
453 }
454 ASSERT(uiop->uio_resid >= 0);
455
456 if (so->so_filter_active > 0 &&
457 ((mp = SOF_FILTER_DATA_OUT(so, mp, msg, cr,
458 &error)) == NULL)) {
459 if (error != 0)
460 break;
461 continue;
462 }
463 error = (*so->so_downcalls->sd_send)
464 (so->so_proto_handle, mp, msg, cr);
465 if (error != 0) {
466 /*
467 * The send failed. We do not have to free the
468 * mblks, because that is the protocol's
469 * responsibility. However, uio_resid must
470 * remain accurate, so adjust that here.
471 */
472 uiop->uio_resid = orig_resid;
473 break;
474 }
475 }
476 } while (uiop->uio_resid > 0);
477
478 SO_UNBLOCK_FALLBACK(so);
479
480 return (error);
481 }
482
483 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)484 so_sendmblk_impl(struct sonode *so, struct nmsghdr *msg, int fflag,
485 struct cred *cr, mblk_t **mpp, sof_instance_t *fil,
486 boolean_t fil_inject)
487 {
488 int error;
489 boolean_t dontblock;
490 size_t size;
491 mblk_t *mp = *mpp;
492
493 if (so->so_downcalls->sd_send == NULL)
494 return (EOPNOTSUPP);
495
496 error = 0;
497 dontblock = (msg->msg_flags & MSG_DONTWAIT) ||
498 (fflag & (FNONBLOCK|FNDELAY));
499 size = msgdsize(mp);
500
501 if ((so->so_mode & SM_ATOMIC) &&
502 size > so->so_proto_props.sopp_maxpsz &&
503 so->so_proto_props.sopp_maxpsz != -1) {
504 SO_UNBLOCK_FALLBACK(so);
505 return (EMSGSIZE);
506 }
507
508 while (mp != NULL) {
509 mblk_t *nmp, *last_mblk;
510 size_t mlen;
511
512 if (so->so_state & SS_CANTSENDMORE) {
513 error = EPIPE;
514 break;
515 }
516 if (so->so_error != 0) {
517 mutex_enter(&so->so_lock);
518 error = sogeterr(so, B_TRUE);
519 mutex_exit(&so->so_lock);
520 if (error != 0)
521 break;
522 }
523 /* Socket filters are not flow controlled */
524 if (SO_SND_FLOWCTRLD(so) && !fil_inject) {
525 /*
526 * Need to wait until the protocol is ready to receive
527 * more data for transmission.
528 */
529 if ((error = so_snd_wait_qnotfull(so, dontblock)) != 0)
530 break;
531 }
532
533 /*
534 * We only allow so_maxpsz of data to be sent down to
535 * the protocol at time.
536 */
537 mlen = MBLKL(mp);
538 nmp = mp->b_cont;
539 last_mblk = mp;
540 while (nmp != NULL) {
541 mlen += MBLKL(nmp);
542 if (mlen > so->so_proto_props.sopp_maxpsz) {
543 last_mblk->b_cont = NULL;
544 break;
545 }
546 last_mblk = nmp;
547 nmp = nmp->b_cont;
548 }
549
550 if (so->so_filter_active > 0 &&
551 (mp = SOF_FILTER_DATA_OUT_FROM(so, fil, mp, msg,
552 cr, &error)) == NULL) {
553 *mpp = mp = nmp;
554 if (error != 0)
555 break;
556 continue;
557 }
558 error = (*so->so_downcalls->sd_send)
559 (so->so_proto_handle, mp, msg, cr);
560 if (error != 0) {
561 /*
562 * The send failed. The protocol will free the mblks
563 * that were sent down. Let the caller deal with the
564 * rest.
565 */
566 *mpp = nmp;
567 break;
568 }
569
570 *mpp = mp = nmp;
571 }
572 /* Let the filter know whether the protocol is flow controlled */
573 if (fil_inject && error == 0 && SO_SND_FLOWCTRLD(so))
574 error = ENOSPC;
575
576 return (error);
577 }
578
579 #pragma inline(so_sendmblk_impl)
580
581 int
so_sendmblk(struct sonode * so,struct nmsghdr * msg,int fflag,struct cred * cr,mblk_t ** mpp)582 so_sendmblk(struct sonode *so, struct nmsghdr *msg, int fflag,
583 struct cred *cr, mblk_t **mpp)
584 {
585 int error;
586
587 SO_BLOCK_FALLBACK(so, SOP_SENDMBLK(so, msg, fflag, cr, mpp));
588
589 if ((so->so_mode & SM_SENDFILESUPP) == 0) {
590 SO_UNBLOCK_FALLBACK(so);
591 return (EOPNOTSUPP);
592 }
593
594 error = so_sendmblk_impl(so, msg, fflag, cr, mpp, so->so_filter_top,
595 B_FALSE);
596
597 SO_UNBLOCK_FALLBACK(so);
598
599 return (error);
600 }
601
602 int
so_shutdown(struct sonode * so,int how,struct cred * cr)603 so_shutdown(struct sonode *so, int how, struct cred *cr)
604 {
605 int error;
606
607 SO_BLOCK_FALLBACK(so, SOP_SHUTDOWN(so, how, cr));
608
609 /*
610 * SunOS 4.X has no check for datagram sockets.
611 * 5.X checks that it is connected (ENOTCONN)
612 * X/Open requires that we check the connected state.
613 */
614 if (!(so->so_state & SS_ISCONNECTED)) {
615 if (!xnet_skip_checks) {
616 error = ENOTCONN;
617 if (xnet_check_print) {
618 printf("sockfs: X/Open shutdown check "
619 "caused ENOTCONN\n");
620 }
621 }
622 goto done;
623 }
624
625 if (so->so_filter_active == 0 ||
626 (error = sof_filter_shutdown(so, &how, cr)) < 0)
627 error = ((*so->so_downcalls->sd_shutdown)(so->so_proto_handle,
628 how, cr));
629
630 /*
631 * Protocol agreed to shutdown. We need to flush the
632 * receive buffer if the receive side is being shutdown.
633 */
634 if (error == 0 && how != SHUT_WR) {
635 mutex_enter(&so->so_lock);
636 /* wait for active reader to finish */
637 (void) so_lock_read(so, 0);
638
639 so_rcv_flush(so);
640
641 so_unlock_read(so);
642 mutex_exit(&so->so_lock);
643 }
644
645 done:
646 SO_UNBLOCK_FALLBACK(so);
647 return (error);
648 }
649
650 int
so_getsockname(struct sonode * so,struct sockaddr * addr,socklen_t * addrlen,struct cred * cr)651 so_getsockname(struct sonode *so, struct sockaddr *addr,
652 socklen_t *addrlen, struct cred *cr)
653 {
654 int error;
655
656 SO_BLOCK_FALLBACK(so, SOP_GETSOCKNAME(so, addr, addrlen, cr));
657
658 if (so->so_filter_active == 0 ||
659 (error = sof_filter_getsockname(so, addr, addrlen, cr)) < 0)
660 error = (*so->so_downcalls->sd_getsockname)
661 (so->so_proto_handle, addr, addrlen, cr);
662
663 SO_UNBLOCK_FALLBACK(so);
664 return (error);
665 }
666
667 int
so_getpeername(struct sonode * so,struct sockaddr * addr,socklen_t * addrlen,boolean_t accept,struct cred * cr)668 so_getpeername(struct sonode *so, struct sockaddr *addr,
669 socklen_t *addrlen, boolean_t accept, struct cred *cr)
670 {
671 int error;
672
673 SO_BLOCK_FALLBACK(so, SOP_GETPEERNAME(so, addr, addrlen, accept, cr));
674
675 if (accept) {
676 error = (*so->so_downcalls->sd_getpeername)
677 (so->so_proto_handle, addr, addrlen, cr);
678 } else if (!(so->so_state & SS_ISCONNECTED)) {
679 error = ENOTCONN;
680 } else if ((so->so_state & SS_CANTSENDMORE) && !xnet_skip_checks) {
681 /* Added this check for X/Open */
682 error = EINVAL;
683 if (xnet_check_print) {
684 printf("sockfs: X/Open getpeername check => EINVAL\n");
685 }
686 } else if (so->so_filter_active == 0 ||
687 (error = sof_filter_getpeername(so, addr, addrlen, cr)) < 0) {
688 error = (*so->so_downcalls->sd_getpeername)
689 (so->so_proto_handle, addr, addrlen, cr);
690 }
691
692 SO_UNBLOCK_FALLBACK(so);
693 return (error);
694 }
695
696 int
so_getsockopt(struct sonode * so,int level,int option_name,void * optval,socklen_t * optlenp,int flags,struct cred * cr)697 so_getsockopt(struct sonode *so, int level, int option_name,
698 void *optval, socklen_t *optlenp, int flags, struct cred *cr)
699 {
700 int error = 0;
701
702 if (level == SOL_FILTER)
703 return (sof_getsockopt(so, option_name, optval, optlenp, cr));
704
705 SO_BLOCK_FALLBACK(so,
706 SOP_GETSOCKOPT(so, level, option_name, optval, optlenp, flags, cr));
707
708 if ((so->so_filter_active == 0 ||
709 (error = sof_filter_getsockopt(so, level, option_name, optval,
710 optlenp, cr)) < 0) &&
711 (error = socket_getopt_common(so, level, option_name, optval,
712 optlenp, flags)) < 0) {
713 error = (*so->so_downcalls->sd_getsockopt)
714 (so->so_proto_handle, level, option_name, optval, optlenp,
715 cr);
716 if (error == ENOPROTOOPT) {
717 if (level == SOL_SOCKET) {
718 /*
719 * If a protocol does not support a particular
720 * socket option, set can fail (not allowed)
721 * but get can not fail. This is the previous
722 * sockfs bahvior.
723 */
724 switch (option_name) {
725 case SO_LINGER:
726 if (*optlenp < (t_uscalar_t)
727 sizeof (struct linger)) {
728 error = EINVAL;
729 break;
730 }
731 error = 0;
732 bzero(optval, sizeof (struct linger));
733 *optlenp = sizeof (struct linger);
734 break;
735 case SO_RCVTIMEO:
736 case SO_SNDTIMEO:
737 if (*optlenp < (t_uscalar_t)
738 sizeof (struct timeval)) {
739 error = EINVAL;
740 break;
741 }
742 error = 0;
743 bzero(optval, sizeof (struct timeval));
744 *optlenp = sizeof (struct timeval);
745 break;
746 case SO_SND_BUFINFO:
747 if (*optlenp < (t_uscalar_t)
748 sizeof (struct so_snd_bufinfo)) {
749 error = EINVAL;
750 break;
751 }
752 error = 0;
753 bzero(optval,
754 sizeof (struct so_snd_bufinfo));
755 *optlenp =
756 sizeof (struct so_snd_bufinfo);
757 break;
758 case SO_DEBUG:
759 case SO_REUSEADDR:
760 case SO_KEEPALIVE:
761 case SO_DONTROUTE:
762 case SO_BROADCAST:
763 case SO_USELOOPBACK:
764 case SO_OOBINLINE:
765 case SO_DGRAM_ERRIND:
766 case SO_SNDBUF:
767 case SO_RCVBUF:
768 error = 0;
769 *((int32_t *)optval) = 0;
770 *optlenp = sizeof (int32_t);
771 break;
772 default:
773 break;
774 }
775 }
776 }
777 }
778
779 SO_UNBLOCK_FALLBACK(so);
780 return (error);
781 }
782
783 int
so_setsockopt(struct sonode * so,int level,int option_name,const void * optval,socklen_t optlen,struct cred * cr)784 so_setsockopt(struct sonode *so, int level, int option_name,
785 const void *optval, socklen_t optlen, struct cred *cr)
786 {
787 int error = 0;
788 struct timeval tl;
789 const void *opt = optval;
790
791 if (level == SOL_FILTER)
792 return (sof_setsockopt(so, option_name, optval, optlen, cr));
793
794 SO_BLOCK_FALLBACK(so,
795 SOP_SETSOCKOPT(so, level, option_name, optval, optlen, cr));
796
797 /* X/Open requires this check */
798 if (so->so_state & SS_CANTSENDMORE && !xnet_skip_checks) {
799 SO_UNBLOCK_FALLBACK(so);
800 if (xnet_check_print)
801 printf("sockfs: X/Open setsockopt check => EINVAL\n");
802 return (EINVAL);
803 }
804
805 if (so->so_filter_active > 0 &&
806 (error = sof_filter_setsockopt(so, level, option_name,
807 (void *)optval, &optlen, cr)) >= 0)
808 goto done;
809
810 if (level == SOL_SOCKET) {
811 switch (option_name) {
812 case SO_RCVTIMEO:
813 case SO_SNDTIMEO: {
814 /*
815 * We pass down these two options to protocol in order
816 * to support some third part protocols which need to
817 * know them. For those protocols which don't care
818 * these two options, simply return 0.
819 */
820 clock_t t_usec;
821
822 if (get_udatamodel() == DATAMODEL_NONE ||
823 get_udatamodel() == DATAMODEL_NATIVE) {
824 if (optlen != sizeof (struct timeval)) {
825 error = EINVAL;
826 goto done;
827 }
828 bcopy((struct timeval *)optval, &tl,
829 sizeof (struct timeval));
830 } else {
831 if (optlen != sizeof (struct timeval32)) {
832 error = EINVAL;
833 goto done;
834 }
835 TIMEVAL32_TO_TIMEVAL(&tl,
836 (struct timeval32 *)optval);
837 }
838 opt = &tl;
839 optlen = sizeof (tl);
840 t_usec = tl.tv_sec * 1000 * 1000 + tl.tv_usec;
841 mutex_enter(&so->so_lock);
842 if (option_name == SO_RCVTIMEO)
843 so->so_rcvtimeo = drv_usectohz(t_usec);
844 else
845 so->so_sndtimeo = drv_usectohz(t_usec);
846 mutex_exit(&so->so_lock);
847 break;
848 }
849 case SO_RCVBUF:
850 /*
851 * XXX XPG 4.2 applications retrieve SO_RCVBUF from
852 * sockfs since the transport might adjust the value
853 * and not return exactly what was set by the
854 * application.
855 */
856 so->so_xpg_rcvbuf = *(int32_t *)optval;
857 break;
858 }
859 }
860 error = (*so->so_downcalls->sd_setsockopt)
861 (so->so_proto_handle, level, option_name, opt, optlen, cr);
862 done:
863 SO_UNBLOCK_FALLBACK(so);
864 return (error);
865 }
866
867 int
so_ioctl(struct sonode * so,int cmd,intptr_t arg,int mode,struct cred * cr,int32_t * rvalp)868 so_ioctl(struct sonode *so, int cmd, intptr_t arg, int mode,
869 struct cred *cr, int32_t *rvalp)
870 {
871 int error = 0;
872
873 SO_BLOCK_FALLBACK(so, SOP_IOCTL(so, cmd, arg, mode, cr, rvalp));
874
875 /*
876 * If there is a pending error, return error
877 * This can happen if a non blocking operation caused an error.
878 */
879 if (so->so_error != 0) {
880 mutex_enter(&so->so_lock);
881 error = sogeterr(so, B_TRUE);
882 mutex_exit(&so->so_lock);
883 if (error != 0)
884 goto done;
885 }
886
887 /*
888 * calling strioc can result in the socket falling back to TPI,
889 * if that is supported.
890 */
891 if ((so->so_filter_active == 0 ||
892 (error = sof_filter_ioctl(so, cmd, arg, mode,
893 rvalp, cr)) < 0) &&
894 (error = socket_ioctl_common(so, cmd, arg, mode, cr, rvalp)) < 0 &&
895 (error = socket_strioc_common(so, cmd, arg, mode, cr, rvalp)) < 0) {
896 error = (*so->so_downcalls->sd_ioctl)(so->so_proto_handle,
897 cmd, arg, mode, rvalp, cr);
898 }
899
900 done:
901 SO_UNBLOCK_FALLBACK(so);
902
903 return (error);
904 }
905
906 int
so_poll(struct sonode * so,short events,int anyyet,short * reventsp,struct pollhead ** phpp)907 so_poll(struct sonode *so, short events, int anyyet, short *reventsp,
908 struct pollhead **phpp)
909 {
910 int state = so->so_state, mask;
911 *reventsp = 0;
912
913 /*
914 * In sockets the errors are represented as input/output events
915 */
916 if (so->so_error != 0 &&
917 ((POLLIN|POLLRDNORM|POLLOUT) & events) != 0) {
918 *reventsp = (POLLIN|POLLRDNORM|POLLOUT) & events;
919 return (0);
920 }
921
922 /*
923 * If the socket is in a state where it can send data
924 * turn on POLLWRBAND and POLLOUT events.
925 */
926 if ((so->so_mode & SM_CONNREQUIRED) == 0 || (state & SS_ISCONNECTED)) {
927 /*
928 * out of band data is allowed even if the connection
929 * is flow controlled
930 */
931 *reventsp |= POLLWRBAND & events;
932 if (!SO_SND_FLOWCTRLD(so)) {
933 /*
934 * As long as there is buffer to send data
935 * turn on POLLOUT events
936 */
937 *reventsp |= POLLOUT & events;
938 }
939 }
940
941 /*
942 * Turn on POLLIN whenever there is data on the receive queue,
943 * or the socket is in a state where no more data will be received.
944 * Also, if the socket is accepting connections, flip the bit if
945 * there is something on the queue.
946 *
947 * We do an initial check for events without holding locks. However,
948 * if there are no event available, then we redo the check for POLLIN
949 * events under the lock.
950 */
951
952 /* Pending connections */
953 if (!list_is_empty(&so->so_acceptq_list))
954 *reventsp |= (POLLIN|POLLRDNORM) & events;
955
956 /* Data */
957 /* so_downcalls is null for sctp */
958 if (so->so_downcalls != NULL && so->so_downcalls->sd_poll != NULL) {
959 *reventsp |= (*so->so_downcalls->sd_poll)
960 (so->so_proto_handle, events & SO_PROTO_POLLEV, anyyet,
961 CRED()) & events;
962 ASSERT((*reventsp & ~events) == 0);
963 /* do not recheck events */
964 events &= ~SO_PROTO_POLLEV;
965 } else {
966 if (SO_HAVE_DATA(so))
967 *reventsp |= (POLLIN|POLLRDNORM) & events;
968
969 /* Urgent data */
970 if ((state & SS_OOBPEND) != 0) {
971 *reventsp |= (POLLRDBAND | POLLPRI) & events;
972 }
973
974 /*
975 * If the socket has become disconnected, we set POLLHUP.
976 * Note that if we are in this state, we will have set POLLIN
977 * (SO_HAVE_DATA() is true on a disconnected socket), but not
978 * POLLOUT (SS_ISCONNECTED is false). This is in keeping with
979 * the semantics of POLLHUP, which is defined to be mutually
980 * exclusive with respect to POLLOUT but not POLLIN. We are
981 * therefore setting POLLHUP primarily for the benefit of
982 * those not polling on POLLIN, as they have no other way of
983 * knowing that the socket has been disconnected.
984 */
985 mask = SS_SENTLASTREADSIG | SS_SENTLASTWRITESIG;
986
987 if ((state & (mask | SS_ISCONNECTED)) == mask)
988 *reventsp |= POLLHUP;
989 }
990
991 if (!*reventsp && !anyyet) {
992 /* Check for read events again, but this time under lock */
993 if (events & (POLLIN|POLLRDNORM)) {
994 mutex_enter(&so->so_lock);
995 if (SO_HAVE_DATA(so) ||
996 !list_is_empty(&so->so_acceptq_list)) {
997 mutex_exit(&so->so_lock);
998 *reventsp |= (POLLIN|POLLRDNORM) & events;
999 return (0);
1000 } else {
1001 so->so_pollev |= SO_POLLEV_IN;
1002 mutex_exit(&so->so_lock);
1003 }
1004 }
1005 *phpp = &so->so_poll_list;
1006 }
1007 return (0);
1008 }
1009
1010 /*
1011 * Generic Upcalls
1012 */
1013 void
so_connected(sock_upper_handle_t sock_handle,sock_connid_t id,cred_t * peer_cred,pid_t peer_cpid)1014 so_connected(sock_upper_handle_t sock_handle, sock_connid_t id,
1015 cred_t *peer_cred, pid_t peer_cpid)
1016 {
1017 struct sonode *so = (struct sonode *)sock_handle;
1018
1019 mutex_enter(&so->so_lock);
1020 ASSERT(so->so_proto_handle != NULL);
1021
1022 if (peer_cred != NULL) {
1023 if (so->so_peercred != NULL)
1024 crfree(so->so_peercred);
1025 crhold(peer_cred);
1026 so->so_peercred = peer_cred;
1027 so->so_cpid = peer_cpid;
1028 }
1029
1030 so->so_proto_connid = id;
1031 soisconnected(so);
1032 /*
1033 * Wake ones who're waiting for conn to become established.
1034 */
1035 so_notify_connected(so);
1036 }
1037
1038 int
so_disconnected(sock_upper_handle_t sock_handle,sock_connid_t id,int error)1039 so_disconnected(sock_upper_handle_t sock_handle, sock_connid_t id, int error)
1040 {
1041 struct sonode *so = (struct sonode *)sock_handle;
1042 boolean_t connect_failed;
1043
1044 mutex_enter(&so->so_lock);
1045
1046 /*
1047 * If we aren't currently connected, then this isn't a disconnect but
1048 * rather a failure to connect.
1049 */
1050 connect_failed = !(so->so_state & SS_ISCONNECTED);
1051
1052 so->so_proto_connid = id;
1053 soisdisconnected(so, error);
1054 so_notify_disconnected(so, connect_failed, error);
1055
1056 return (0);
1057 }
1058
1059 void
so_opctl(sock_upper_handle_t sock_handle,sock_opctl_action_t action,uintptr_t arg)1060 so_opctl(sock_upper_handle_t sock_handle, sock_opctl_action_t action,
1061 uintptr_t arg)
1062 {
1063 struct sonode *so = (struct sonode *)sock_handle;
1064
1065 switch (action) {
1066 case SOCK_OPCTL_SHUT_SEND:
1067 mutex_enter(&so->so_lock);
1068 socantsendmore(so);
1069 so_notify_disconnecting(so);
1070 break;
1071 case SOCK_OPCTL_SHUT_RECV: {
1072 mutex_enter(&so->so_lock);
1073 socantrcvmore(so);
1074 so_notify_eof(so);
1075 break;
1076 }
1077 case SOCK_OPCTL_ENAB_ACCEPT:
1078 mutex_enter(&so->so_lock);
1079 so->so_state |= SS_ACCEPTCONN;
1080 so->so_backlog = (unsigned int)arg;
1081 /*
1082 * The protocol can stop generating newconn upcalls when
1083 * the backlog is full, so to make sure the listener does
1084 * not end up with a queue full of deferred connections
1085 * we reduce the backlog by one. Thus the listener will
1086 * start closing deferred connections before the backlog
1087 * is full.
1088 */
1089 if (so->so_filter_active > 0)
1090 so->so_backlog = MAX(1, so->so_backlog - 1);
1091 mutex_exit(&so->so_lock);
1092 break;
1093 default:
1094 ASSERT(0);
1095 break;
1096 }
1097 }
1098
1099 void
so_txq_full(sock_upper_handle_t sock_handle,boolean_t qfull)1100 so_txq_full(sock_upper_handle_t sock_handle, boolean_t qfull)
1101 {
1102 struct sonode *so = (struct sonode *)sock_handle;
1103
1104 if (qfull) {
1105 so_snd_qfull(so);
1106 } else {
1107 so_snd_qnotfull(so);
1108 mutex_enter(&so->so_lock);
1109 /* so_notify_writable drops so_lock */
1110 so_notify_writable(so);
1111 }
1112 }
1113
1114 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)1115 so_newconn(sock_upper_handle_t parenthandle,
1116 sock_lower_handle_t proto_handle, sock_downcalls_t *sock_downcalls,
1117 struct cred *peer_cred, pid_t peer_cpid, sock_upcalls_t **sock_upcallsp)
1118 {
1119 struct sonode *so = (struct sonode *)parenthandle;
1120 struct sonode *nso;
1121 int error;
1122
1123 ASSERT(proto_handle != NULL);
1124
1125 if ((so->so_state & SS_ACCEPTCONN) == 0 ||
1126 (so->so_acceptq_len >= so->so_backlog &&
1127 (so->so_filter_active == 0 || !sof_sonode_drop_deferred(so)))) {
1128 return (NULL);
1129 }
1130
1131 nso = socket_newconn(so, proto_handle, sock_downcalls, SOCKET_NOSLEEP,
1132 &error);
1133 if (nso == NULL)
1134 return (NULL);
1135
1136 if (peer_cred != NULL) {
1137 crhold(peer_cred);
1138 nso->so_peercred = peer_cred;
1139 nso->so_cpid = peer_cpid;
1140 }
1141 nso->so_listener = so;
1142
1143 /*
1144 * The new socket (nso), proto_handle and sock_upcallsp are all
1145 * valid at this point. But as soon as nso is placed in the accept
1146 * queue that can no longer be assumed (since an accept() thread may
1147 * pull it off the queue and close the socket).
1148 */
1149 *sock_upcallsp = &so_upcalls;
1150
1151 mutex_enter(&so->so_acceptq_lock);
1152 if (so->so_state & (SS_CLOSING|SS_FALLBACK_PENDING|SS_FALLBACK_COMP)) {
1153 mutex_exit(&so->so_acceptq_lock);
1154 ASSERT(nso->so_count == 1);
1155 nso->so_count--;
1156 nso->so_listener = NULL;
1157 /* drop proto ref */
1158 VN_RELE(SOTOV(nso));
1159 socket_destroy(nso);
1160 return (NULL);
1161 } else {
1162 so->so_acceptq_len++;
1163 if (nso->so_state & SS_FIL_DEFER) {
1164 list_insert_tail(&so->so_acceptq_defer, nso);
1165 mutex_exit(&so->so_acceptq_lock);
1166 } else {
1167 list_insert_tail(&so->so_acceptq_list, nso);
1168 cv_signal(&so->so_acceptq_cv);
1169 mutex_exit(&so->so_acceptq_lock);
1170 mutex_enter(&so->so_lock);
1171 so_notify_newconn(so);
1172 }
1173
1174 return ((sock_upper_handle_t)nso);
1175 }
1176 }
1177
1178 void
so_set_prop(sock_upper_handle_t sock_handle,struct sock_proto_props * soppp)1179 so_set_prop(sock_upper_handle_t sock_handle, struct sock_proto_props *soppp)
1180 {
1181 struct sonode *so;
1182
1183 so = (struct sonode *)sock_handle;
1184
1185 mutex_enter(&so->so_lock);
1186
1187 if (soppp->sopp_flags & SOCKOPT_MAXBLK)
1188 so->so_proto_props.sopp_maxblk = soppp->sopp_maxblk;
1189 if (soppp->sopp_flags & SOCKOPT_WROFF)
1190 so->so_proto_props.sopp_wroff = soppp->sopp_wroff;
1191 if (soppp->sopp_flags & SOCKOPT_TAIL)
1192 so->so_proto_props.sopp_tail = soppp->sopp_tail;
1193 if (soppp->sopp_flags & SOCKOPT_RCVHIWAT)
1194 so->so_proto_props.sopp_rxhiwat = soppp->sopp_rxhiwat;
1195 if (soppp->sopp_flags & SOCKOPT_RCVLOWAT)
1196 so->so_proto_props.sopp_rxlowat = soppp->sopp_rxlowat;
1197 if (soppp->sopp_flags & SOCKOPT_MAXPSZ)
1198 so->so_proto_props.sopp_maxpsz = soppp->sopp_maxpsz;
1199 if (soppp->sopp_flags & SOCKOPT_MINPSZ)
1200 so->so_proto_props.sopp_minpsz = soppp->sopp_minpsz;
1201 if (soppp->sopp_flags & SOCKOPT_ZCOPY) {
1202 if (soppp->sopp_zcopyflag & ZCVMSAFE) {
1203 so->so_proto_props.sopp_zcopyflag |= STZCVMSAFE;
1204 so->so_proto_props.sopp_zcopyflag &= ~STZCVMUNSAFE;
1205 } else if (soppp->sopp_zcopyflag & ZCVMUNSAFE) {
1206 so->so_proto_props.sopp_zcopyflag |= STZCVMUNSAFE;
1207 so->so_proto_props.sopp_zcopyflag &= ~STZCVMSAFE;
1208 }
1209
1210 if (soppp->sopp_zcopyflag & COPYCACHED) {
1211 so->so_proto_props.sopp_zcopyflag |= STRCOPYCACHED;
1212 }
1213 }
1214 if (soppp->sopp_flags & SOCKOPT_OOBINLINE)
1215 so->so_proto_props.sopp_oobinline = soppp->sopp_oobinline;
1216 if (soppp->sopp_flags & SOCKOPT_RCVTIMER)
1217 so->so_proto_props.sopp_rcvtimer = soppp->sopp_rcvtimer;
1218 if (soppp->sopp_flags & SOCKOPT_RCVTHRESH)
1219 so->so_proto_props.sopp_rcvthresh = soppp->sopp_rcvthresh;
1220 if (soppp->sopp_flags & SOCKOPT_MAXADDRLEN)
1221 so->so_proto_props.sopp_maxaddrlen = soppp->sopp_maxaddrlen;
1222 if (soppp->sopp_flags & SOCKOPT_LOOPBACK)
1223 so->so_proto_props.sopp_loopback = soppp->sopp_loopback;
1224
1225 mutex_exit(&so->so_lock);
1226
1227 if (so->so_filter_active > 0) {
1228 sof_instance_t *inst;
1229 ssize_t maxblk;
1230 ushort_t wroff, tail;
1231 maxblk = so->so_proto_props.sopp_maxblk;
1232 wroff = so->so_proto_props.sopp_wroff;
1233 tail = so->so_proto_props.sopp_tail;
1234 for (inst = so->so_filter_bottom; inst != NULL;
1235 inst = inst->sofi_prev) {
1236 if (SOF_INTERESTED(inst, mblk_prop)) {
1237 (*inst->sofi_ops->sofop_mblk_prop)(
1238 (sof_handle_t)inst, inst->sofi_cookie,
1239 &maxblk, &wroff, &tail);
1240 }
1241 }
1242 mutex_enter(&so->so_lock);
1243 so->so_proto_props.sopp_maxblk = maxblk;
1244 so->so_proto_props.sopp_wroff = wroff;
1245 so->so_proto_props.sopp_tail = tail;
1246 mutex_exit(&so->so_lock);
1247 }
1248 #ifdef DEBUG
1249 soppp->sopp_flags &= ~(SOCKOPT_MAXBLK | SOCKOPT_WROFF | SOCKOPT_TAIL |
1250 SOCKOPT_RCVHIWAT | SOCKOPT_RCVLOWAT | SOCKOPT_MAXPSZ |
1251 SOCKOPT_ZCOPY | SOCKOPT_OOBINLINE | SOCKOPT_RCVTIMER |
1252 SOCKOPT_RCVTHRESH | SOCKOPT_MAXADDRLEN | SOCKOPT_MINPSZ |
1253 SOCKOPT_LOOPBACK);
1254 ASSERT(soppp->sopp_flags == 0);
1255 #endif
1256 }
1257
1258 /* ARGSUSED */
1259 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)1260 so_queue_msg_impl(struct sonode *so, mblk_t *mp,
1261 size_t msg_size, int flags, int *errorp, boolean_t *force_pushp,
1262 sof_instance_t *filter)
1263 {
1264 boolean_t force_push = B_TRUE;
1265 int space_left;
1266 sodirect_t *sodp = so->so_direct;
1267
1268 ASSERT(errorp != NULL);
1269 *errorp = 0;
1270 if (mp == NULL) {
1271 if (so->so_downcalls->sd_recv_uio != NULL) {
1272 mutex_enter(&so->so_lock);
1273 /* the notify functions will drop the lock */
1274 if (flags & MSG_OOB)
1275 so_notify_oobdata(so, IS_SO_OOB_INLINE(so));
1276 else
1277 so_notify_data(so, msg_size);
1278 return (0);
1279 }
1280 ASSERT(msg_size == 0);
1281 mutex_enter(&so->so_lock);
1282 goto space_check;
1283 }
1284
1285 ASSERT(mp->b_next == NULL);
1286 ASSERT(DB_TYPE(mp) == M_DATA || DB_TYPE(mp) == M_PROTO);
1287 ASSERT(msg_size == msgdsize(mp));
1288
1289 if (DB_TYPE(mp) == M_PROTO && !__TPI_PRIM_ISALIGNED(mp->b_rptr)) {
1290 /* The read pointer is not aligned correctly for TPI */
1291 zcmn_err(getzoneid(), CE_WARN,
1292 "sockfs: Unaligned TPI message received. rptr = %p\n",
1293 (void *)mp->b_rptr);
1294 freemsg(mp);
1295 mutex_enter(&so->so_lock);
1296 if (sodp != NULL)
1297 SOD_UIOAFINI(sodp);
1298 goto space_check;
1299 }
1300
1301 if (so->so_filter_active > 0) {
1302 for (; filter != NULL; filter = filter->sofi_prev) {
1303 if (!SOF_INTERESTED(filter, data_in))
1304 continue;
1305 mp = (*filter->sofi_ops->sofop_data_in)(
1306 (sof_handle_t)filter, filter->sofi_cookie, mp,
1307 flags, &msg_size);
1308 ASSERT(msgdsize(mp) == msg_size);
1309 DTRACE_PROBE2(filter__data, (sof_instance_t), filter,
1310 (mblk_t *), mp);
1311 /* Data was consumed/dropped, just do space check */
1312 if (msg_size == 0) {
1313 mutex_enter(&so->so_lock);
1314 goto space_check;
1315 }
1316 }
1317 }
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 #pragma inline(so_queue_msg_impl)
1406
1407 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)1408 so_queue_msg(sock_upper_handle_t sock_handle, mblk_t *mp,
1409 size_t msg_size, int flags, int *errorp, boolean_t *force_pushp)
1410 {
1411 struct sonode *so = (struct sonode *)sock_handle;
1412
1413 return (so_queue_msg_impl(so, mp, msg_size, flags, errorp, force_pushp,
1414 so->so_filter_bottom));
1415 }
1416
1417 /*
1418 * Set the offset of where the oob data is relative to the bytes in
1419 * queued. Also generate SIGURG
1420 */
1421 void
so_signal_oob(sock_upper_handle_t sock_handle,ssize_t offset)1422 so_signal_oob(sock_upper_handle_t sock_handle, ssize_t offset)
1423 {
1424 struct sonode *so;
1425
1426 ASSERT(offset >= 0);
1427 so = (struct sonode *)sock_handle;
1428 mutex_enter(&so->so_lock);
1429 if (so->so_direct != NULL)
1430 SOD_UIOAFINI(so->so_direct);
1431
1432 /*
1433 * New urgent data on the way so forget about any old
1434 * urgent data.
1435 */
1436 so->so_state &= ~(SS_HAVEOOBDATA|SS_HADOOBDATA);
1437
1438 /*
1439 * Record that urgent data is pending.
1440 */
1441 so->so_state |= SS_OOBPEND;
1442
1443 if (so->so_oobmsg != NULL) {
1444 dprintso(so, 1, ("sock: discarding old oob\n"));
1445 freemsg(so->so_oobmsg);
1446 so->so_oobmsg = NULL;
1447 }
1448
1449 /*
1450 * set the offset where the urgent byte is
1451 */
1452 so->so_oobmark = so->so_rcv_queued + offset;
1453 if (so->so_oobmark == 0)
1454 so->so_state |= SS_RCVATMARK;
1455 else
1456 so->so_state &= ~SS_RCVATMARK;
1457
1458 so_notify_oobsig(so);
1459 }
1460
1461 /*
1462 * Queue the OOB byte
1463 */
1464 static void
so_queue_oob(struct sonode * so,mblk_t * mp,size_t len)1465 so_queue_oob(struct sonode *so, mblk_t *mp, size_t len)
1466 {
1467 mutex_enter(&so->so_lock);
1468 if (so->so_direct != NULL)
1469 SOD_UIOAFINI(so->so_direct);
1470
1471 ASSERT(mp != NULL);
1472 if (!IS_SO_OOB_INLINE(so)) {
1473 so->so_oobmsg = mp;
1474 so->so_state |= SS_HAVEOOBDATA;
1475 } else {
1476 so_enqueue_msg(so, mp, len);
1477 }
1478
1479 so_notify_oobdata(so, IS_SO_OOB_INLINE(so));
1480 }
1481
1482 int
so_close(struct sonode * so,int flag,struct cred * cr)1483 so_close(struct sonode *so, int flag, struct cred *cr)
1484 {
1485 int error;
1486
1487 /*
1488 * No new data will be enqueued once the CLOSING flag is set.
1489 */
1490 mutex_enter(&so->so_lock);
1491 so->so_state |= SS_CLOSING;
1492 ASSERT(so_verify_oobstate(so));
1493 so_rcv_flush(so);
1494 mutex_exit(&so->so_lock);
1495
1496 if (so->so_filter_active > 0)
1497 sof_sonode_closing(so);
1498
1499 if (so->so_state & SS_ACCEPTCONN) {
1500 /*
1501 * We grab and release the accept lock to ensure that any
1502 * thread about to insert a socket in so_newconn completes
1503 * before we flush the queue. Any thread calling so_newconn
1504 * after we drop the lock will observe the SS_CLOSING flag,
1505 * which will stop it from inserting the socket in the queue.
1506 */
1507 mutex_enter(&so->so_acceptq_lock);
1508 mutex_exit(&so->so_acceptq_lock);
1509
1510 so_acceptq_flush(so, B_TRUE);
1511 }
1512
1513 error = (*so->so_downcalls->sd_close)(so->so_proto_handle, flag, cr);
1514 switch (error) {
1515 default:
1516 /* Protocol made a synchronous close; remove proto ref */
1517 VN_RELE(SOTOV(so));
1518 break;
1519 case EINPROGRESS:
1520 /*
1521 * Protocol is in the process of closing, it will make a
1522 * 'closed' upcall to remove the reference.
1523 */
1524 error = 0;
1525 break;
1526 }
1527
1528 return (error);
1529 }
1530
1531 /*
1532 * Upcall made by the protocol when it's doing an asynchronous close. It
1533 * will drop the protocol's reference on the socket.
1534 */
1535 void
so_closed(sock_upper_handle_t sock_handle)1536 so_closed(sock_upper_handle_t sock_handle)
1537 {
1538 struct sonode *so = (struct sonode *)sock_handle;
1539
1540 VN_RELE(SOTOV(so));
1541 }
1542
1543 void
so_zcopy_notify(sock_upper_handle_t sock_handle)1544 so_zcopy_notify(sock_upper_handle_t sock_handle)
1545 {
1546 struct sonode *so = (struct sonode *)sock_handle;
1547
1548 mutex_enter(&so->so_lock);
1549 so->so_copyflag |= STZCNOTIFY;
1550 cv_broadcast(&so->so_copy_cv);
1551 mutex_exit(&so->so_lock);
1552 }
1553
1554 void
so_set_error(sock_upper_handle_t sock_handle,int error)1555 so_set_error(sock_upper_handle_t sock_handle, int error)
1556 {
1557 struct sonode *so = (struct sonode *)sock_handle;
1558
1559 mutex_enter(&so->so_lock);
1560
1561 soseterror(so, error);
1562
1563 so_notify_error(so);
1564 }
1565
1566 /*
1567 * so_recvmsg - read data from the socket
1568 *
1569 * There are two ways of obtaining data; either we ask the protocol to
1570 * copy directly into the supplied buffer, or we copy data from the
1571 * sonode's receive queue. The decision which one to use depends on
1572 * whether the protocol has a sd_recv_uio down call.
1573 */
1574 int
so_recvmsg(struct sonode * so,struct nmsghdr * msg,struct uio * uiop,struct cred * cr)1575 so_recvmsg(struct sonode *so, struct nmsghdr *msg, struct uio *uiop,
1576 struct cred *cr)
1577 {
1578 rval_t rval;
1579 int flags = 0;
1580 t_uscalar_t controllen, namelen;
1581 int error = 0;
1582 int ret;
1583 mblk_t *mctlp = NULL;
1584 union T_primitives *tpr;
1585 void *control;
1586 ssize_t saved_resid;
1587 struct uio *suiop;
1588
1589 SO_BLOCK_FALLBACK(so, SOP_RECVMSG(so, msg, uiop, cr));
1590
1591 if ((so->so_state & (SS_ISCONNECTED|SS_CANTRCVMORE)) == 0 &&
1592 (so->so_mode & SM_CONNREQUIRED)) {
1593 SO_UNBLOCK_FALLBACK(so);
1594 return (ENOTCONN);
1595 }
1596
1597 if (msg->msg_flags & MSG_PEEK)
1598 msg->msg_flags &= ~MSG_WAITALL;
1599
1600 if (so->so_mode & SM_ATOMIC)
1601 msg->msg_flags |= MSG_TRUNC;
1602
1603 if (msg->msg_flags & MSG_OOB) {
1604 if ((so->so_mode & SM_EXDATA) == 0) {
1605 error = EOPNOTSUPP;
1606 } else if (so->so_downcalls->sd_recv_uio != NULL) {
1607 error = (*so->so_downcalls->sd_recv_uio)
1608 (so->so_proto_handle, uiop, msg, cr);
1609 } else {
1610 error = sorecvoob(so, msg, uiop, msg->msg_flags,
1611 IS_SO_OOB_INLINE(so));
1612 }
1613 SO_UNBLOCK_FALLBACK(so);
1614 return (error);
1615 }
1616
1617 /*
1618 * If the protocol has the recv down call, then pass the request
1619 * down.
1620 */
1621 if (so->so_downcalls->sd_recv_uio != NULL) {
1622 error = (*so->so_downcalls->sd_recv_uio)
1623 (so->so_proto_handle, uiop, msg, cr);
1624 SO_UNBLOCK_FALLBACK(so);
1625 return (error);
1626 }
1627
1628 /*
1629 * Reading data from the socket buffer
1630 */
1631 flags = msg->msg_flags;
1632 msg->msg_flags = 0;
1633
1634 /*
1635 * Set msg_controllen and msg_namelen to zero here to make it
1636 * simpler in the cases that no control or name is returned.
1637 */
1638 controllen = msg->msg_controllen;
1639 namelen = msg->msg_namelen;
1640 msg->msg_controllen = 0;
1641 msg->msg_namelen = 0;
1642
1643 mutex_enter(&so->so_lock);
1644 /* Set SOREADLOCKED */
1645 error = so_lock_read_intr(so,
1646 uiop->uio_fmode | ((flags & MSG_DONTWAIT) ? FNONBLOCK : 0));
1647 mutex_exit(&so->so_lock);
1648 if (error) {
1649 SO_UNBLOCK_FALLBACK(so);
1650 return (error);
1651 }
1652
1653 suiop = sod_rcv_init(so, flags, &uiop);
1654 retry:
1655 saved_resid = uiop->uio_resid;
1656 error = so_dequeue_msg(so, &mctlp, uiop, &rval, flags);
1657 if (error != 0) {
1658 goto out;
1659 }
1660 /*
1661 * For datagrams the MOREDATA flag is used to set MSG_TRUNC.
1662 * For non-datagrams MOREDATA is used to set MSG_EOR.
1663 */
1664 ASSERT(!(rval.r_val1 & MORECTL));
1665 if ((rval.r_val1 & MOREDATA) && (so->so_mode & SM_ATOMIC))
1666 msg->msg_flags |= MSG_TRUNC;
1667 if (mctlp == NULL) {
1668 dprintso(so, 1, ("so_recvmsg: got M_DATA\n"));
1669
1670 mutex_enter(&so->so_lock);
1671 /* Set MSG_EOR based on MOREDATA */
1672 if (!(rval.r_val1 & MOREDATA)) {
1673 if (so->so_state & SS_SAVEDEOR) {
1674 msg->msg_flags |= MSG_EOR;
1675 so->so_state &= ~SS_SAVEDEOR;
1676 }
1677 }
1678 /*
1679 * If some data was received (i.e. not EOF) and the
1680 * read/recv* has not been satisfied wait for some more.
1681 */
1682 if ((flags & MSG_WAITALL) && !(msg->msg_flags & MSG_EOR) &&
1683 uiop->uio_resid != saved_resid && uiop->uio_resid > 0) {
1684 mutex_exit(&so->so_lock);
1685 flags |= MSG_NOMARK;
1686 goto retry;
1687 }
1688
1689 goto out_locked;
1690 }
1691 /* so_queue_msg has already verified length and alignment */
1692 tpr = (union T_primitives *)mctlp->b_rptr;
1693 dprintso(so, 1, ("so_recvmsg: type %d\n", tpr->type));
1694 switch (tpr->type) {
1695 case T_DATA_IND: {
1696 /*
1697 * Set msg_flags to MSG_EOR based on
1698 * MORE_flag and MOREDATA.
1699 */
1700 mutex_enter(&so->so_lock);
1701 so->so_state &= ~SS_SAVEDEOR;
1702 if (!(tpr->data_ind.MORE_flag & 1)) {
1703 if (!(rval.r_val1 & MOREDATA))
1704 msg->msg_flags |= MSG_EOR;
1705 else
1706 so->so_state |= SS_SAVEDEOR;
1707 }
1708 freemsg(mctlp);
1709 /*
1710 * If some data was received (i.e. not EOF) and the
1711 * read/recv* has not been satisfied wait for some more.
1712 */
1713 if ((flags & MSG_WAITALL) && !(msg->msg_flags & MSG_EOR) &&
1714 uiop->uio_resid != saved_resid && uiop->uio_resid > 0) {
1715 mutex_exit(&so->so_lock);
1716 flags |= MSG_NOMARK;
1717 goto retry;
1718 }
1719 goto out_locked;
1720 }
1721 case T_UNITDATA_IND: {
1722 void *addr;
1723 t_uscalar_t addrlen;
1724 void *abuf;
1725 t_uscalar_t optlen;
1726 void *opt;
1727
1728 if (namelen != 0) {
1729 /* Caller wants source address */
1730 addrlen = tpr->unitdata_ind.SRC_length;
1731 addr = sogetoff(mctlp, tpr->unitdata_ind.SRC_offset,
1732 addrlen, 1);
1733 if (addr == NULL) {
1734 freemsg(mctlp);
1735 error = EPROTO;
1736 eprintsoline(so, error);
1737 goto out;
1738 }
1739 ASSERT(so->so_family != AF_UNIX);
1740 }
1741 optlen = tpr->unitdata_ind.OPT_length;
1742 if (optlen != 0) {
1743 t_uscalar_t ncontrollen;
1744
1745 /*
1746 * Extract any source address option.
1747 * Determine how large cmsg buffer is needed.
1748 */
1749 opt = sogetoff(mctlp, tpr->unitdata_ind.OPT_offset,
1750 optlen, __TPI_ALIGN_SIZE);
1751
1752 if (opt == NULL) {
1753 freemsg(mctlp);
1754 error = EPROTO;
1755 eprintsoline(so, error);
1756 goto out;
1757 }
1758 if (so->so_family == AF_UNIX)
1759 so_getopt_srcaddr(opt, optlen, &addr, &addrlen);
1760 ncontrollen = so_cmsglen(mctlp, opt, optlen,
1761 !(flags & MSG_XPG4_2));
1762 if (controllen != 0)
1763 controllen = ncontrollen;
1764 else if (ncontrollen != 0)
1765 msg->msg_flags |= MSG_CTRUNC;
1766 } else {
1767 controllen = 0;
1768 }
1769
1770 if (namelen != 0) {
1771 /*
1772 * Return address to caller.
1773 * Caller handles truncation if length
1774 * exceeds msg_namelen.
1775 * NOTE: AF_UNIX NUL termination is ensured by
1776 * the sender's copyin_name().
1777 */
1778 abuf = kmem_alloc(addrlen, KM_SLEEP);
1779
1780 bcopy(addr, abuf, addrlen);
1781 msg->msg_name = abuf;
1782 msg->msg_namelen = addrlen;
1783 }
1784
1785 if (controllen != 0) {
1786 /*
1787 * Return control msg to caller.
1788 * Caller handles truncation if length
1789 * exceeds msg_controllen.
1790 */
1791 control = kmem_zalloc(controllen, KM_SLEEP);
1792
1793 error = so_opt2cmsg(mctlp, opt, optlen,
1794 !(flags & MSG_XPG4_2), control, controllen);
1795 if (error) {
1796 freemsg(mctlp);
1797 if (msg->msg_namelen != 0)
1798 kmem_free(msg->msg_name,
1799 msg->msg_namelen);
1800 kmem_free(control, controllen);
1801 eprintsoline(so, error);
1802 goto out;
1803 }
1804 msg->msg_control = control;
1805 msg->msg_controllen = controllen;
1806 }
1807
1808 freemsg(mctlp);
1809 goto out;
1810 }
1811 case T_OPTDATA_IND: {
1812 struct T_optdata_req *tdr;
1813 void *opt;
1814 t_uscalar_t optlen;
1815
1816 tdr = (struct T_optdata_req *)mctlp->b_rptr;
1817 optlen = tdr->OPT_length;
1818 if (optlen != 0) {
1819 t_uscalar_t ncontrollen;
1820 /*
1821 * Determine how large cmsg buffer is needed.
1822 */
1823 opt = sogetoff(mctlp,
1824 tpr->optdata_ind.OPT_offset, optlen,
1825 __TPI_ALIGN_SIZE);
1826
1827 if (opt == NULL) {
1828 freemsg(mctlp);
1829 error = EPROTO;
1830 eprintsoline(so, error);
1831 goto out;
1832 }
1833
1834 ncontrollen = so_cmsglen(mctlp, opt, optlen,
1835 !(flags & MSG_XPG4_2));
1836 if (controllen != 0)
1837 controllen = ncontrollen;
1838 else if (ncontrollen != 0)
1839 msg->msg_flags |= MSG_CTRUNC;
1840 } else {
1841 controllen = 0;
1842 }
1843
1844 if (controllen != 0) {
1845 /*
1846 * Return control msg to caller.
1847 * Caller handles truncation if length
1848 * exceeds msg_controllen.
1849 */
1850 control = kmem_zalloc(controllen, KM_SLEEP);
1851
1852 error = so_opt2cmsg(mctlp, opt, optlen,
1853 !(flags & MSG_XPG4_2), control, controllen);
1854 if (error) {
1855 freemsg(mctlp);
1856 kmem_free(control, controllen);
1857 eprintsoline(so, error);
1858 goto out;
1859 }
1860 msg->msg_control = control;
1861 msg->msg_controllen = controllen;
1862 }
1863
1864 /*
1865 * Set msg_flags to MSG_EOR based on
1866 * DATA_flag and MOREDATA.
1867 */
1868 mutex_enter(&so->so_lock);
1869 so->so_state &= ~SS_SAVEDEOR;
1870 if (!(tpr->data_ind.MORE_flag & 1)) {
1871 if (!(rval.r_val1 & MOREDATA))
1872 msg->msg_flags |= MSG_EOR;
1873 else
1874 so->so_state |= SS_SAVEDEOR;
1875 }
1876 freemsg(mctlp);
1877 /*
1878 * If some data was received (i.e. not EOF) and the
1879 * read/recv* has not been satisfied wait for some more.
1880 * Not possible to wait if control info was received.
1881 */
1882 if ((flags & MSG_WAITALL) && !(msg->msg_flags & MSG_EOR) &&
1883 controllen == 0 &&
1884 uiop->uio_resid != saved_resid && uiop->uio_resid > 0) {
1885 mutex_exit(&so->so_lock);
1886 flags |= MSG_NOMARK;
1887 goto retry;
1888 }
1889 goto out_locked;
1890 }
1891 default:
1892 cmn_err(CE_CONT, "so_recvmsg bad type %x \n",
1893 tpr->type);
1894 freemsg(mctlp);
1895 error = EPROTO;
1896 ASSERT(0);
1897 }
1898 out:
1899 mutex_enter(&so->so_lock);
1900 out_locked:
1901 ret = sod_rcv_done(so, suiop, uiop);
1902 if (ret != 0 && error == 0)
1903 error = ret;
1904
1905 so_unlock_read(so); /* Clear SOREADLOCKED */
1906 mutex_exit(&so->so_lock);
1907
1908 SO_UNBLOCK_FALLBACK(so);
1909
1910 return (error);
1911 }
1912
1913 sonodeops_t so_sonodeops = {
1914 so_init, /* sop_init */
1915 so_accept, /* sop_accept */
1916 so_bind, /* sop_bind */
1917 so_listen, /* sop_listen */
1918 so_connect, /* sop_connect */
1919 so_recvmsg, /* sop_recvmsg */
1920 so_sendmsg, /* sop_sendmsg */
1921 so_sendmblk, /* sop_sendmblk */
1922 so_getpeername, /* sop_getpeername */
1923 so_getsockname, /* sop_getsockname */
1924 so_shutdown, /* sop_shutdown */
1925 so_getsockopt, /* sop_getsockopt */
1926 so_setsockopt, /* sop_setsockopt */
1927 so_ioctl, /* sop_ioctl */
1928 so_poll, /* sop_poll */
1929 so_close, /* sop_close */
1930 };
1931
1932 sock_upcalls_t so_upcalls = {
1933 so_newconn,
1934 so_connected,
1935 so_disconnected,
1936 so_opctl,
1937 so_queue_msg,
1938 so_set_prop,
1939 so_txq_full,
1940 so_signal_oob,
1941 so_zcopy_notify,
1942 so_set_error,
1943 so_closed
1944 };
1945