Annotation of src/sys/kern/uipc_socket.c, Revision 1.105
1.105 ! christos 1: /* $NetBSD: uipc_socket.c,v 1.104 2004/07/01 12:42:57 yamt Exp $ */
1.64 thorpej 2:
3: /*-
4: * Copyright (c) 2002 The NetBSD Foundation, Inc.
5: * All rights reserved.
6: *
7: * This code is derived from software contributed to The NetBSD Foundation
8: * by Jason R. Thorpe of Wasabi Systems, Inc.
9: *
10: * Redistribution and use in source and binary forms, with or without
11: * modification, are permitted provided that the following conditions
12: * are met:
13: * 1. Redistributions of source code must retain the above copyright
14: * notice, this list of conditions and the following disclaimer.
15: * 2. Redistributions in binary form must reproduce the above copyright
16: * notice, this list of conditions and the following disclaimer in the
17: * documentation and/or other materials provided with the distribution.
18: * 3. All advertising materials mentioning features or use of this software
19: * must display the following acknowledgement:
20: * This product includes software developed by the NetBSD
21: * Foundation, Inc. and its contributors.
22: * 4. Neither the name of The NetBSD Foundation nor the names of its
23: * contributors may be used to endorse or promote products derived
24: * from this software without specific prior written permission.
25: *
26: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36: * POSSIBILITY OF SUCH DAMAGE.
37: */
1.16 cgd 38:
1.1 cgd 39: /*
1.15 mycroft 40: * Copyright (c) 1982, 1986, 1988, 1990, 1993
41: * The Regents of the University of California. All rights reserved.
1.1 cgd 42: *
43: * Redistribution and use in source and binary forms, with or without
44: * modification, are permitted provided that the following conditions
45: * are met:
46: * 1. Redistributions of source code must retain the above copyright
47: * notice, this list of conditions and the following disclaimer.
48: * 2. Redistributions in binary form must reproduce the above copyright
49: * notice, this list of conditions and the following disclaimer in the
50: * documentation and/or other materials provided with the distribution.
1.85 agc 51: * 3. Neither the name of the University nor the names of its contributors
1.1 cgd 52: * may be used to endorse or promote products derived from this software
53: * without specific prior written permission.
54: *
55: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
56: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
57: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
58: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
59: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
60: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
61: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
62: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
63: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
64: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
65: * SUCH DAMAGE.
66: *
1.32 fvdl 67: * @(#)uipc_socket.c 8.6 (Berkeley) 5/2/95
1.1 cgd 68: */
1.59 lukem 69:
70: #include <sys/cdefs.h>
1.105 ! christos 71: __KERNEL_RCSID(0, "$NetBSD: uipc_socket.c,v 1.104 2004/07/01 12:42:57 yamt Exp $");
1.64 thorpej 72:
73: #include "opt_sock_counters.h"
74: #include "opt_sosend_loan.h"
1.81 martin 75: #include "opt_mbuftrace.h"
1.84 ragge 76: #include "opt_somaxkva.h"
1.1 cgd 77:
1.9 mycroft 78: #include <sys/param.h>
79: #include <sys/systm.h>
80: #include <sys/proc.h>
81: #include <sys/file.h>
82: #include <sys/malloc.h>
83: #include <sys/mbuf.h>
84: #include <sys/domain.h>
85: #include <sys/kernel.h>
86: #include <sys/protosw.h>
87: #include <sys/socket.h>
88: #include <sys/socketvar.h>
1.21 christos 89: #include <sys/signalvar.h>
1.9 mycroft 90: #include <sys/resourcevar.h>
1.37 thorpej 91: #include <sys/pool.h>
1.72 jdolecek 92: #include <sys/event.h>
1.89 christos 93: #include <sys/poll.h>
1.37 thorpej 94:
1.64 thorpej 95: #include <uvm/uvm.h>
96:
1.100 simonb 97: POOL_INIT(socket_pool, sizeof(struct socket), 0, 0, 0, "sockpl", NULL);
1.77 thorpej 98:
99: MALLOC_DEFINE(M_SOOPTS, "soopts", "socket options");
100: MALLOC_DEFINE(M_SONAME, "soname", "socket name");
1.37 thorpej 101:
1.54 lukem 102: extern int somaxconn; /* patchable (XXX sysctl) */
103: int somaxconn = SOMAXCONN;
1.49 jonathan 104:
1.64 thorpej 105: #ifdef SOSEND_COUNTERS
106: #include <sys/device.h>
107:
108: struct evcnt sosend_loan_big = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
109: NULL, "sosend", "loan big");
110: struct evcnt sosend_copy_big = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
111: NULL, "sosend", "copy big");
112: struct evcnt sosend_copy_small = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
113: NULL, "sosend", "copy small");
114: struct evcnt sosend_kvalimit = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
115: NULL, "sosend", "kva limit");
116:
117: #define SOSEND_COUNTER_INCR(ev) (ev)->ev_count++
118:
1.101 matt 119: EVCNT_ATTACH_STATIC(sosend_loan_big);
120: EVCNT_ATTACH_STATIC(sosend_copy_big);
121: EVCNT_ATTACH_STATIC(sosend_copy_small);
122: EVCNT_ATTACH_STATIC(sosend_kvalimit);
1.64 thorpej 123: #else
124:
125: #define SOSEND_COUNTER_INCR(ev) /* nothing */
126:
127: #endif /* SOSEND_COUNTERS */
128:
1.37 thorpej 129: void
1.54 lukem 130: soinit(void)
1.37 thorpej 131: {
1.91 thorpej 132:
133: /* Set the initial adjusted socket buffer size. */
134: if (sb_max_set(sb_max))
135: panic("bad initial sb_max value: %lu\n", sb_max);
1.37 thorpej 136:
137: }
1.1 cgd 138:
1.71 thorpej 139: #ifdef SOSEND_NO_LOAN
140: int use_sosend_loan = 0;
141: #else
1.65 thorpej 142: int use_sosend_loan = 1;
143: #endif
1.64 thorpej 144:
1.93 yamt 145: struct simplelock so_pendfree_slock = SIMPLELOCK_INITIALIZER;
1.64 thorpej 146: struct mbuf *so_pendfree;
147:
1.84 ragge 148: #ifndef SOMAXKVA
149: #define SOMAXKVA (16 * 1024 * 1024)
150: #endif
151: int somaxkva = SOMAXKVA;
1.64 thorpej 152: int socurkva;
153: int sokvawaiters;
154:
155: #define SOCK_LOAN_THRESH 4096
156: #define SOCK_LOAN_CHUNK 65536
157:
1.80 yamt 158: static size_t sodopendfree(struct socket *);
1.93 yamt 159: static size_t sodopendfreel(struct socket *);
1.98 christos 160: static __inline vsize_t sokvareserve(struct socket *, vsize_t);
1.95 yamt 161: static __inline void sokvaunreserve(vsize_t);
1.93 yamt 162:
1.98 christos 163: static __inline vsize_t
1.95 yamt 164: sokvareserve(struct socket *so, vsize_t len)
1.80 yamt 165: {
166: int s;
1.98 christos 167: int error;
1.80 yamt 168:
1.93 yamt 169: s = splvm();
170: simple_lock(&so_pendfree_slock);
1.80 yamt 171: while (socurkva + len > somaxkva) {
1.93 yamt 172: size_t freed;
173:
174: /*
175: * try to do pendfree.
176: */
177:
178: freed = sodopendfreel(so);
179:
180: /*
181: * if some kva was freed, try again.
182: */
183:
184: if (freed)
1.80 yamt 185: continue;
1.93 yamt 186:
1.80 yamt 187: SOSEND_COUNTER_INCR(&sosend_kvalimit);
188: sokvawaiters++;
1.98 christos 189: error = ltsleep(&socurkva, PVM | PCATCH, "sokva", 0,
190: &so_pendfree_slock);
1.80 yamt 191: sokvawaiters--;
1.98 christos 192: if (error) {
193: len = 0;
194: break;
195: }
1.80 yamt 196: }
1.93 yamt 197: socurkva += len;
198: simple_unlock(&so_pendfree_slock);
199: splx(s);
1.98 christos 200: return len;
1.95 yamt 201: }
202:
203: static __inline void
204: sokvaunreserve(vsize_t len)
205: {
206: int s;
207:
208: s = splvm();
209: simple_lock(&so_pendfree_slock);
210: socurkva -= len;
211: if (sokvawaiters)
212: wakeup(&socurkva);
213: simple_unlock(&so_pendfree_slock);
214: splx(s);
215: }
216:
217: /*
218: * sokvaalloc: allocate kva for loan.
219: */
220:
221: vaddr_t
222: sokvaalloc(vsize_t len, struct socket *so)
223: {
224: vaddr_t lva;
225:
226: /*
227: * reserve kva.
228: */
229:
1.98 christos 230: if (sokvareserve(so, len) == 0)
231: return 0;
1.93 yamt 232:
233: /*
234: * allocate kva.
235: */
1.80 yamt 236:
237: lva = uvm_km_valloc_wait(kernel_map, len);
1.95 yamt 238: if (lva == 0) {
239: sokvaunreserve(len);
1.80 yamt 240: return (0);
1.95 yamt 241: }
1.80 yamt 242:
243: return lva;
244: }
245:
1.93 yamt 246: /*
247: * sokvafree: free kva for loan.
248: */
249:
1.80 yamt 250: void
251: sokvafree(vaddr_t sva, vsize_t len)
252: {
1.93 yamt 253:
254: /*
255: * free kva.
256: */
1.80 yamt 257:
258: uvm_km_free(kernel_map, sva, len);
1.93 yamt 259:
260: /*
261: * unreserve kva.
262: */
263:
1.95 yamt 264: sokvaunreserve(len);
1.80 yamt 265: }
266:
1.64 thorpej 267: static void
1.79 thorpej 268: sodoloanfree(struct vm_page **pgs, caddr_t buf, size_t size)
1.64 thorpej 269: {
270: vaddr_t va, sva, eva;
271: vsize_t len;
272: paddr_t pa;
273: int i, npgs;
274:
275: eva = round_page((vaddr_t) buf + size);
276: sva = trunc_page((vaddr_t) buf);
277: len = eva - sva;
278: npgs = len >> PAGE_SHIFT;
279:
1.79 thorpej 280: if (__predict_false(pgs == NULL)) {
281: pgs = alloca(npgs * sizeof(*pgs));
1.64 thorpej 282:
1.79 thorpej 283: for (i = 0, va = sva; va < eva; i++, va += PAGE_SIZE) {
284: if (pmap_extract(pmap_kernel(), va, &pa) == FALSE)
285: panic("sodoloanfree: va 0x%lx not mapped", va);
286: pgs[i] = PHYS_TO_VM_PAGE(pa);
287: }
1.64 thorpej 288: }
289:
290: pmap_kremove(sva, len);
291: pmap_update(pmap_kernel());
292: uvm_unloan(pgs, npgs, UVM_LOAN_TOPAGE);
1.80 yamt 293: sokvafree(sva, len);
1.64 thorpej 294: }
295:
296: static size_t
297: sodopendfree(struct socket *so)
298: {
299: int s;
1.93 yamt 300: size_t rv;
1.64 thorpej 301:
302: s = splvm();
1.93 yamt 303: simple_lock(&so_pendfree_slock);
304: rv = sodopendfreel(so);
305: simple_unlock(&so_pendfree_slock);
306: splx(s);
307:
308: return rv;
309: }
310:
311: /*
312: * sodopendfreel: free mbufs on "pendfree" list.
313: * unlock and relock so_pendfree_slock when freeing mbufs.
314: *
315: * => called with so_pendfree_slock held.
316: * => called at splvm.
317: */
318:
319: static size_t
320: sodopendfreel(struct socket *so)
321: {
322: size_t rv = 0;
323:
324: LOCK_ASSERT(simple_lock_held(&so_pendfree_slock));
1.64 thorpej 325:
326: for (;;) {
1.93 yamt 327: struct mbuf *m;
328: struct mbuf *next;
329:
1.64 thorpej 330: m = so_pendfree;
331: if (m == NULL)
332: break;
1.93 yamt 333: so_pendfree = NULL;
334: simple_unlock(&so_pendfree_slock);
335: /* XXX splx */
336:
337: for (; m != NULL; m = next) {
338: next = m->m_next;
339:
340: rv += m->m_ext.ext_size;
341: sodoloanfree((m->m_flags & M_EXT_PAGES) ?
342: m->m_ext.ext_pgs : NULL, m->m_ext.ext_buf,
343: m->m_ext.ext_size);
344: pool_cache_put(&mbpool_cache, m);
345: }
1.64 thorpej 346:
1.93 yamt 347: /* XXX splvm */
348: simple_lock(&so_pendfree_slock);
1.64 thorpej 349: }
350:
351: return (rv);
352: }
353:
1.80 yamt 354: void
1.76 thorpej 355: soloanfree(struct mbuf *m, caddr_t buf, size_t size, void *arg)
1.64 thorpej 356: {
357: int s;
358:
359: if (m == NULL) {
1.93 yamt 360:
361: /*
362: * called from MEXTREMOVE.
363: */
364:
1.79 thorpej 365: sodoloanfree(NULL, buf, size);
1.64 thorpej 366: return;
367: }
368:
1.93 yamt 369: /*
370: * postpone freeing mbuf.
371: *
372: * we can't do it in interrupt context
373: * because we need to put kva back to kernel_map.
374: */
375:
1.64 thorpej 376: s = splvm();
1.93 yamt 377: simple_lock(&so_pendfree_slock);
1.92 yamt 378: m->m_next = so_pendfree;
379: so_pendfree = m;
1.64 thorpej 380: if (sokvawaiters)
381: wakeup(&socurkva);
1.93 yamt 382: simple_unlock(&so_pendfree_slock);
383: splx(s);
1.64 thorpej 384: }
385:
386: static long
387: sosend_loan(struct socket *so, struct uio *uio, struct mbuf *m, long space)
388: {
389: struct iovec *iov = uio->uio_iov;
390: vaddr_t sva, eva;
391: vsize_t len;
392: vaddr_t lva, va;
1.80 yamt 393: int npgs, i, error;
1.64 thorpej 394:
395: if (uio->uio_segflg != UIO_USERSPACE)
396: return (0);
397:
398: if (iov->iov_len < (size_t) space)
399: space = iov->iov_len;
400: if (space > SOCK_LOAN_CHUNK)
401: space = SOCK_LOAN_CHUNK;
402:
403: eva = round_page((vaddr_t) iov->iov_base + space);
404: sva = trunc_page((vaddr_t) iov->iov_base);
405: len = eva - sva;
406: npgs = len >> PAGE_SHIFT;
407:
1.79 thorpej 408: /* XXX KDASSERT */
409: KASSERT(npgs <= M_EXT_MAXPAGES);
1.102 jonathan 410: KASSERT(uio->uio_procp != NULL);
1.79 thorpej 411:
1.80 yamt 412: lva = sokvaalloc(len, so);
1.64 thorpej 413: if (lva == 0)
1.80 yamt 414: return 0;
1.64 thorpej 415:
1.83 fvdl 416: error = uvm_loan(&uio->uio_procp->p_vmspace->vm_map, sva, len,
1.79 thorpej 417: m->m_ext.ext_pgs, UVM_LOAN_TOPAGE);
1.64 thorpej 418: if (error) {
1.80 yamt 419: sokvafree(lva, len);
1.64 thorpej 420: return (0);
421: }
422:
423: for (i = 0, va = lva; i < npgs; i++, va += PAGE_SIZE)
1.79 thorpej 424: pmap_kenter_pa(va, VM_PAGE_TO_PHYS(m->m_ext.ext_pgs[i]),
425: VM_PROT_READ);
1.64 thorpej 426: pmap_update(pmap_kernel());
427:
428: lva += (vaddr_t) iov->iov_base & PAGE_MASK;
429:
430: MEXTADD(m, (caddr_t) lva, space, M_MBUF, soloanfree, so);
1.79 thorpej 431: m->m_flags |= M_EXT_PAGES | M_EXT_ROMAP;
1.64 thorpej 432:
433: uio->uio_resid -= space;
434: /* uio_offset not updated, not set/used for write(2) */
435: uio->uio_iov->iov_base = (caddr_t) uio->uio_iov->iov_base + space;
436: uio->uio_iov->iov_len -= space;
437: if (uio->uio_iov->iov_len == 0) {
438: uio->uio_iov++;
439: uio->uio_iovcnt--;
440: }
441:
442: return (space);
443: }
444:
1.1 cgd 445: /*
446: * Socket operation routines.
447: * These routines are called by the routines in
448: * sys_socket.c or from a system process, and
449: * implement the semantics of socket operations by
450: * switching out to the protocol specific routines.
451: */
452: /*ARGSUSED*/
1.3 andrew 453: int
1.102 jonathan 454: socreate(int dom, struct socket **aso, int type, int proto, struct proc *p)
1.1 cgd 455: {
1.99 matt 456: const struct protosw *prp;
1.54 lukem 457: struct socket *so;
458: int error, s;
1.1 cgd 459:
460: if (proto)
461: prp = pffindproto(dom, proto, type);
462: else
463: prp = pffindtype(dom, type);
1.15 mycroft 464: if (prp == 0 || prp->pr_usrreq == 0)
1.1 cgd 465: return (EPROTONOSUPPORT);
466: if (prp->pr_type != type)
467: return (EPROTOTYPE);
1.39 matt 468: s = splsoftnet();
1.37 thorpej 469: so = pool_get(&socket_pool, PR_WAITOK);
1.38 perry 470: memset((caddr_t)so, 0, sizeof(*so));
1.31 thorpej 471: TAILQ_INIT(&so->so_q0);
472: TAILQ_INIT(&so->so_q);
1.1 cgd 473: so->so_type = type;
474: so->so_proto = prp;
1.33 matt 475: so->so_send = sosend;
476: so->so_receive = soreceive;
1.78 matt 477: #ifdef MBUFTRACE
478: so->so_rcv.sb_mowner = &prp->pr_domain->dom_mowner;
479: so->so_snd.sb_mowner = &prp->pr_domain->dom_mowner;
480: so->so_mowner = &prp->pr_domain->dom_mowner;
481: #endif
1.44 lukem 482: if (p != 0)
483: so->so_uid = p->p_ucred->cr_uid;
1.98 christos 484: else
485: so->so_uid = UID_MAX;
1.22 mycroft 486: error = (*prp->pr_usrreq)(so, PRU_ATTACH, (struct mbuf *)0,
1.83 fvdl 487: (struct mbuf *)(long)proto, (struct mbuf *)0, p);
1.1 cgd 488: if (error) {
489: so->so_state |= SS_NOFDREF;
490: sofree(so);
1.39 matt 491: splx(s);
1.1 cgd 492: return (error);
493: }
1.39 matt 494: splx(s);
1.1 cgd 495: *aso = so;
496: return (0);
497: }
498:
1.3 andrew 499: int
1.83 fvdl 500: sobind(struct socket *so, struct mbuf *nam, struct proc *p)
1.1 cgd 501: {
1.54 lukem 502: int s, error;
1.1 cgd 503:
1.54 lukem 504: s = splsoftnet();
1.22 mycroft 505: error = (*so->so_proto->pr_usrreq)(so, PRU_BIND, (struct mbuf *)0,
1.83 fvdl 506: nam, (struct mbuf *)0, p);
1.1 cgd 507: splx(s);
508: return (error);
509: }
510:
1.3 andrew 511: int
1.54 lukem 512: solisten(struct socket *so, int backlog)
1.1 cgd 513: {
1.54 lukem 514: int s, error;
1.1 cgd 515:
1.54 lukem 516: s = splsoftnet();
1.22 mycroft 517: error = (*so->so_proto->pr_usrreq)(so, PRU_LISTEN, (struct mbuf *)0,
1.83 fvdl 518: (struct mbuf *)0, (struct mbuf *)0, (struct proc *)0);
1.1 cgd 519: if (error) {
520: splx(s);
521: return (error);
522: }
1.63 matt 523: if (TAILQ_EMPTY(&so->so_q))
1.1 cgd 524: so->so_options |= SO_ACCEPTCONN;
525: if (backlog < 0)
526: backlog = 0;
1.49 jonathan 527: so->so_qlimit = min(backlog, somaxconn);
1.1 cgd 528: splx(s);
529: return (0);
530: }
531:
1.21 christos 532: void
1.54 lukem 533: sofree(struct socket *so)
1.1 cgd 534: {
535:
1.43 mycroft 536: if (so->so_pcb || (so->so_state & SS_NOFDREF) == 0)
1.1 cgd 537: return;
1.43 mycroft 538: if (so->so_head) {
539: /*
540: * We must not decommission a socket that's on the accept(2)
541: * queue. If we do, then accept(2) may hang after select(2)
542: * indicated that the listening socket was ready.
543: */
544: if (!soqremque(so, 0))
545: return;
546: }
1.98 christos 547: if (so->so_rcv.sb_hiwat)
548: (void)chgsbsize(so->so_uid, &so->so_rcv.sb_hiwat, 0,
549: RLIM_INFINITY);
550: if (so->so_snd.sb_hiwat)
551: (void)chgsbsize(so->so_uid, &so->so_snd.sb_hiwat, 0,
552: RLIM_INFINITY);
553: sbrelease(&so->so_snd, so);
1.1 cgd 554: sorflush(so);
1.37 thorpej 555: pool_put(&socket_pool, so);
1.1 cgd 556: }
557:
558: /*
559: * Close a socket on last file table reference removal.
560: * Initiate disconnect if connected.
561: * Free socket when disconnect complete.
562: */
1.3 andrew 563: int
1.54 lukem 564: soclose(struct socket *so)
1.1 cgd 565: {
1.54 lukem 566: struct socket *so2;
567: int s, error;
1.1 cgd 568:
1.54 lukem 569: error = 0;
570: s = splsoftnet(); /* conservative */
1.1 cgd 571: if (so->so_options & SO_ACCEPTCONN) {
1.63 matt 572: while ((so2 = TAILQ_FIRST(&so->so_q0)) != 0) {
1.42 mycroft 573: (void) soqremque(so2, 0);
1.41 mycroft 574: (void) soabort(so2);
575: }
1.63 matt 576: while ((so2 = TAILQ_FIRST(&so->so_q)) != 0) {
1.42 mycroft 577: (void) soqremque(so2, 1);
1.41 mycroft 578: (void) soabort(so2);
579: }
1.1 cgd 580: }
581: if (so->so_pcb == 0)
582: goto discard;
583: if (so->so_state & SS_ISCONNECTED) {
584: if ((so->so_state & SS_ISDISCONNECTING) == 0) {
585: error = sodisconnect(so);
586: if (error)
587: goto drop;
588: }
589: if (so->so_options & SO_LINGER) {
590: if ((so->so_state & SS_ISDISCONNECTING) &&
591: (so->so_state & SS_NBIO))
592: goto drop;
1.21 christos 593: while (so->so_state & SS_ISCONNECTED) {
594: error = tsleep((caddr_t)&so->so_timeo,
595: PSOCK | PCATCH, netcls,
1.30 thorpej 596: so->so_linger * hz);
1.21 christos 597: if (error)
1.1 cgd 598: break;
1.21 christos 599: }
1.1 cgd 600: }
601: }
1.54 lukem 602: drop:
1.1 cgd 603: if (so->so_pcb) {
1.22 mycroft 604: int error2 = (*so->so_proto->pr_usrreq)(so, PRU_DETACH,
605: (struct mbuf *)0, (struct mbuf *)0, (struct mbuf *)0,
1.83 fvdl 606: (struct proc *)0);
1.1 cgd 607: if (error == 0)
608: error = error2;
609: }
1.54 lukem 610: discard:
1.1 cgd 611: if (so->so_state & SS_NOFDREF)
612: panic("soclose: NOFDREF");
613: so->so_state |= SS_NOFDREF;
614: sofree(so);
615: splx(s);
616: return (error);
617: }
618:
619: /*
1.20 mycroft 620: * Must be called at splsoftnet...
1.1 cgd 621: */
1.3 andrew 622: int
1.54 lukem 623: soabort(struct socket *so)
1.1 cgd 624: {
625:
1.22 mycroft 626: return (*so->so_proto->pr_usrreq)(so, PRU_ABORT, (struct mbuf *)0,
1.83 fvdl 627: (struct mbuf *)0, (struct mbuf *)0, (struct proc *)0);
1.1 cgd 628: }
629:
1.3 andrew 630: int
1.54 lukem 631: soaccept(struct socket *so, struct mbuf *nam)
1.1 cgd 632: {
1.54 lukem 633: int s, error;
1.1 cgd 634:
1.54 lukem 635: error = 0;
636: s = splsoftnet();
1.1 cgd 637: if ((so->so_state & SS_NOFDREF) == 0)
638: panic("soaccept: !NOFDREF");
639: so->so_state &= ~SS_NOFDREF;
1.55 thorpej 640: if ((so->so_state & SS_ISDISCONNECTED) == 0 ||
641: (so->so_proto->pr_flags & PR_ABRTACPTDIS) == 0)
1.41 mycroft 642: error = (*so->so_proto->pr_usrreq)(so, PRU_ACCEPT,
1.83 fvdl 643: (struct mbuf *)0, nam, (struct mbuf *)0, (struct proc *)0);
1.41 mycroft 644: else
1.53 itojun 645: error = ECONNABORTED;
1.52 itojun 646:
1.1 cgd 647: splx(s);
648: return (error);
649: }
650:
1.3 andrew 651: int
1.102 jonathan 652: soconnect(struct socket *so, struct mbuf *nam, struct proc *p)
1.1 cgd 653: {
1.54 lukem 654: int s, error;
1.1 cgd 655:
656: if (so->so_options & SO_ACCEPTCONN)
657: return (EOPNOTSUPP);
1.20 mycroft 658: s = splsoftnet();
1.1 cgd 659: /*
660: * If protocol is connection-based, can only connect once.
661: * Otherwise, if connected, try to disconnect first.
662: * This allows user to disconnect by connecting to, e.g.,
663: * a null address.
664: */
665: if (so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING) &&
666: ((so->so_proto->pr_flags & PR_CONNREQUIRED) ||
667: (error = sodisconnect(so))))
668: error = EISCONN;
669: else
670: error = (*so->so_proto->pr_usrreq)(so, PRU_CONNECT,
1.83 fvdl 671: (struct mbuf *)0, nam, (struct mbuf *)0, p);
1.1 cgd 672: splx(s);
673: return (error);
674: }
675:
1.3 andrew 676: int
1.54 lukem 677: soconnect2(struct socket *so1, struct socket *so2)
1.1 cgd 678: {
1.54 lukem 679: int s, error;
1.1 cgd 680:
1.54 lukem 681: s = splsoftnet();
1.22 mycroft 682: error = (*so1->so_proto->pr_usrreq)(so1, PRU_CONNECT2,
683: (struct mbuf *)0, (struct mbuf *)so2, (struct mbuf *)0,
1.83 fvdl 684: (struct proc *)0);
1.1 cgd 685: splx(s);
686: return (error);
687: }
688:
1.3 andrew 689: int
1.54 lukem 690: sodisconnect(struct socket *so)
1.1 cgd 691: {
1.54 lukem 692: int s, error;
1.1 cgd 693:
1.54 lukem 694: s = splsoftnet();
1.1 cgd 695: if ((so->so_state & SS_ISCONNECTED) == 0) {
696: error = ENOTCONN;
697: goto bad;
698: }
699: if (so->so_state & SS_ISDISCONNECTING) {
700: error = EALREADY;
701: goto bad;
702: }
1.22 mycroft 703: error = (*so->so_proto->pr_usrreq)(so, PRU_DISCONNECT,
704: (struct mbuf *)0, (struct mbuf *)0, (struct mbuf *)0,
1.83 fvdl 705: (struct proc *)0);
1.54 lukem 706: bad:
1.1 cgd 707: splx(s);
1.64 thorpej 708: sodopendfree(so);
1.1 cgd 709: return (error);
710: }
711:
1.15 mycroft 712: #define SBLOCKWAIT(f) (((f) & MSG_DONTWAIT) ? M_NOWAIT : M_WAITOK)
1.1 cgd 713: /*
714: * Send on a socket.
715: * If send must go all at once and message is larger than
716: * send buffering, then hard error.
717: * Lock against other senders.
718: * If must go all at once and not enough room now, then
719: * inform user that this would block and do nothing.
720: * Otherwise, if nonblocking, send as much as possible.
721: * The data to be sent is described by "uio" if nonzero,
722: * otherwise by the mbuf chain "top" (which must be null
723: * if uio is not). Data provided in mbuf chain must be small
724: * enough to send all at once.
725: *
726: * Returns nonzero on error, timeout or signal; callers
727: * must check for short counts if EINTR/ERESTART are returned.
728: * Data and control buffers are freed on return.
729: */
1.3 andrew 730: int
1.54 lukem 731: sosend(struct socket *so, struct mbuf *addr, struct uio *uio, struct mbuf *top,
1.102 jonathan 732: struct mbuf *control, int flags, struct proc *p)
1.1 cgd 733: {
1.54 lukem 734: struct mbuf **mp, *m;
1.58 jdolecek 735: long space, len, resid, clen, mlen;
736: int error, s, dontroute, atomic;
1.54 lukem 737:
1.64 thorpej 738: sodopendfree(so);
739:
1.54 lukem 740: clen = 0;
741: atomic = sosendallatonce(so) || top;
1.1 cgd 742: if (uio)
743: resid = uio->uio_resid;
744: else
745: resid = top->m_pkthdr.len;
1.7 cgd 746: /*
747: * In theory resid should be unsigned.
748: * However, space must be signed, as it might be less than 0
749: * if we over-committed, and we must use a signed comparison
750: * of space and resid. On the other hand, a negative resid
751: * causes us to loop sending 0-length segments to the protocol.
752: */
1.29 mycroft 753: if (resid < 0) {
754: error = EINVAL;
755: goto out;
756: }
1.1 cgd 757: dontroute =
758: (flags & MSG_DONTROUTE) && (so->so_options & SO_DONTROUTE) == 0 &&
759: (so->so_proto->pr_flags & PR_ATOMIC);
1.102 jonathan 760: if (p)
761: p->p_stats->p_ru.ru_msgsnd++;
1.1 cgd 762: if (control)
763: clen = control->m_len;
764: #define snderr(errno) { error = errno; splx(s); goto release; }
765:
1.54 lukem 766: restart:
1.21 christos 767: if ((error = sblock(&so->so_snd, SBLOCKWAIT(flags))) != 0)
1.1 cgd 768: goto out;
769: do {
1.20 mycroft 770: s = splsoftnet();
1.1 cgd 771: if (so->so_state & SS_CANTSENDMORE)
772: snderr(EPIPE);
1.48 thorpej 773: if (so->so_error) {
774: error = so->so_error;
775: so->so_error = 0;
776: splx(s);
777: goto release;
778: }
1.1 cgd 779: if ((so->so_state & SS_ISCONNECTED) == 0) {
780: if (so->so_proto->pr_flags & PR_CONNREQUIRED) {
781: if ((so->so_state & SS_ISCONFIRMING) == 0 &&
782: !(resid == 0 && clen != 0))
783: snderr(ENOTCONN);
784: } else if (addr == 0)
785: snderr(EDESTADDRREQ);
786: }
787: space = sbspace(&so->so_snd);
788: if (flags & MSG_OOB)
789: space += 1024;
1.21 christos 790: if ((atomic && resid > so->so_snd.sb_hiwat) ||
1.11 mycroft 791: clen > so->so_snd.sb_hiwat)
792: snderr(EMSGSIZE);
1.96 mycroft 793: if (space < resid + clen &&
1.1 cgd 794: (atomic || space < so->so_snd.sb_lowat || space < clen)) {
795: if (so->so_state & SS_NBIO)
796: snderr(EWOULDBLOCK);
797: sbunlock(&so->so_snd);
798: error = sbwait(&so->so_snd);
799: splx(s);
800: if (error)
801: goto out;
802: goto restart;
803: }
804: splx(s);
805: mp = ⊤
806: space -= clen;
807: do {
1.45 tv 808: if (uio == NULL) {
809: /*
810: * Data is prepackaged in "top".
811: */
812: resid = 0;
813: if (flags & MSG_EOR)
814: top->m_flags |= M_EOR;
815: } else do {
816: if (top == 0) {
1.78 matt 817: m = m_gethdr(M_WAIT, MT_DATA);
1.45 tv 818: mlen = MHLEN;
819: m->m_pkthdr.len = 0;
820: m->m_pkthdr.rcvif = (struct ifnet *)0;
821: } else {
1.78 matt 822: m = m_get(M_WAIT, MT_DATA);
1.45 tv 823: mlen = MLEN;
824: }
1.78 matt 825: MCLAIM(m, so->so_snd.sb_mowner);
1.65 thorpej 826: if (use_sosend_loan &&
827: uio->uio_iov->iov_len >= SOCK_LOAN_THRESH &&
1.64 thorpej 828: space >= SOCK_LOAN_THRESH &&
829: (len = sosend_loan(so, uio, m,
830: space)) != 0) {
831: SOSEND_COUNTER_INCR(&sosend_loan_big);
832: space -= len;
833: goto have_data;
834: }
1.45 tv 835: if (resid >= MINCLSIZE && space >= MCLBYTES) {
1.64 thorpej 836: SOSEND_COUNTER_INCR(&sosend_copy_big);
1.78 matt 837: m_clget(m, M_WAIT);
1.45 tv 838: if ((m->m_flags & M_EXT) == 0)
839: goto nopages;
840: mlen = MCLBYTES;
841: if (atomic && top == 0) {
1.58 jdolecek 842: len = lmin(MCLBYTES - max_hdr,
1.54 lukem 843: resid);
1.45 tv 844: m->m_data += max_hdr;
845: } else
1.58 jdolecek 846: len = lmin(MCLBYTES, resid);
1.45 tv 847: space -= len;
848: } else {
1.64 thorpej 849: nopages:
850: SOSEND_COUNTER_INCR(&sosend_copy_small);
1.58 jdolecek 851: len = lmin(lmin(mlen, resid), space);
1.45 tv 852: space -= len;
853: /*
854: * For datagram protocols, leave room
855: * for protocol headers in first mbuf.
856: */
857: if (atomic && top == 0 && len < mlen)
858: MH_ALIGN(m, len);
859: }
1.54 lukem 860: error = uiomove(mtod(m, caddr_t), (int)len,
861: uio);
1.64 thorpej 862: have_data:
1.45 tv 863: resid = uio->uio_resid;
864: m->m_len = len;
865: *mp = m;
866: top->m_pkthdr.len += len;
867: if (error)
868: goto release;
869: mp = &m->m_next;
870: if (resid <= 0) {
871: if (flags & MSG_EOR)
872: top->m_flags |= M_EOR;
873: break;
874: }
875: } while (space > 0 && atomic);
1.46 sommerfe 876:
877: s = splsoftnet();
878:
879: if (so->so_state & SS_CANTSENDMORE)
880: snderr(EPIPE);
1.45 tv 881:
882: if (dontroute)
883: so->so_options |= SO_DONTROUTE;
884: if (resid > 0)
885: so->so_state |= SS_MORETOCOME;
1.46 sommerfe 886: error = (*so->so_proto->pr_usrreq)(so,
887: (flags & MSG_OOB) ? PRU_SENDOOB : PRU_SEND,
1.83 fvdl 888: top, addr, control, p);
1.45 tv 889: if (dontroute)
890: so->so_options &= ~SO_DONTROUTE;
891: if (resid > 0)
892: so->so_state &= ~SS_MORETOCOME;
1.46 sommerfe 893: splx(s);
894:
1.45 tv 895: clen = 0;
896: control = 0;
897: top = 0;
898: mp = ⊤
1.1 cgd 899: if (error)
900: goto release;
901: } while (resid && space > 0);
902: } while (resid);
903:
1.54 lukem 904: release:
1.1 cgd 905: sbunlock(&so->so_snd);
1.54 lukem 906: out:
1.1 cgd 907: if (top)
908: m_freem(top);
909: if (control)
910: m_freem(control);
911: return (error);
912: }
913:
914: /*
915: * Implement receive operations on a socket.
916: * We depend on the way that records are added to the sockbuf
917: * by sbappend*. In particular, each record (mbufs linked through m_next)
918: * must begin with an address if the protocol so specifies,
919: * followed by an optional mbuf or mbufs containing ancillary data,
920: * and then zero or more mbufs of data.
921: * In order to avoid blocking network interrupts for the entire time here,
922: * we splx() while doing the actual copy to user space.
923: * Although the sockbuf is locked, new data may still be appended,
924: * and thus we must maintain consistency of the sockbuf during that time.
925: *
926: * The caller may receive the data as a single mbuf chain by supplying
927: * an mbuf **mp0 for use in returning the chain. The uio is then used
928: * only for the count in uio_resid.
929: */
1.3 andrew 930: int
1.54 lukem 931: soreceive(struct socket *so, struct mbuf **paddr, struct uio *uio,
932: struct mbuf **mp0, struct mbuf **controlp, int *flagsp)
1.1 cgd 933: {
1.102 jonathan 934: struct proc * p;
1.54 lukem 935: struct mbuf *m, **mp;
936: int flags, len, error, s, offset, moff, type, orig_resid;
1.99 matt 937: const struct protosw *pr;
1.54 lukem 938: struct mbuf *nextrecord;
1.67 he 939: int mbuf_removed = 0;
1.64 thorpej 940:
1.54 lukem 941: pr = so->so_proto;
1.1 cgd 942: mp = mp0;
1.54 lukem 943: type = 0;
944: orig_resid = uio->uio_resid;
1.102 jonathan 945: p = uio->uio_procp;
946:
1.1 cgd 947: if (paddr)
948: *paddr = 0;
949: if (controlp)
950: *controlp = 0;
951: if (flagsp)
952: flags = *flagsp &~ MSG_EOR;
953: else
954: flags = 0;
1.66 enami 955:
956: if ((flags & MSG_DONTWAIT) == 0)
957: sodopendfree(so);
958:
1.1 cgd 959: if (flags & MSG_OOB) {
960: m = m_get(M_WAIT, MT_DATA);
1.17 cgd 961: error = (*pr->pr_usrreq)(so, PRU_RCVOOB, m,
1.102 jonathan 962: (struct mbuf *)(long)(flags & MSG_PEEK),
963: (struct mbuf *)0, p);
1.1 cgd 964: if (error)
965: goto bad;
966: do {
967: error = uiomove(mtod(m, caddr_t),
968: (int) min(uio->uio_resid, m->m_len), uio);
969: m = m_free(m);
970: } while (uio->uio_resid && error == 0 && m);
1.54 lukem 971: bad:
1.1 cgd 972: if (m)
973: m_freem(m);
974: return (error);
975: }
976: if (mp)
977: *mp = (struct mbuf *)0;
978: if (so->so_state & SS_ISCONFIRMING && uio->uio_resid)
1.22 mycroft 979: (*pr->pr_usrreq)(so, PRU_RCVD, (struct mbuf *)0,
1.102 jonathan 980: (struct mbuf *)0, (struct mbuf *)0, p);
1.1 cgd 981:
1.54 lukem 982: restart:
1.21 christos 983: if ((error = sblock(&so->so_rcv, SBLOCKWAIT(flags))) != 0)
1.1 cgd 984: return (error);
1.20 mycroft 985: s = splsoftnet();
1.1 cgd 986:
987: m = so->so_rcv.sb_mb;
988: /*
989: * If we have less data than requested, block awaiting more
990: * (subject to any timeout) if:
1.15 mycroft 991: * 1. the current count is less than the low water mark,
1.1 cgd 992: * 2. MSG_WAITALL is set, and it is possible to do the entire
1.15 mycroft 993: * receive operation at once if we block (resid <= hiwat), or
994: * 3. MSG_DONTWAIT is not set.
1.1 cgd 995: * If MSG_WAITALL is set but resid is larger than the receive buffer,
996: * we have to do the receive in sections, and thus risk returning
997: * a short count if a timeout or signal occurs after we start.
998: */
1.21 christos 999: if (m == 0 || (((flags & MSG_DONTWAIT) == 0 &&
1.15 mycroft 1000: so->so_rcv.sb_cc < uio->uio_resid) &&
1.1 cgd 1001: (so->so_rcv.sb_cc < so->so_rcv.sb_lowat ||
1002: ((flags & MSG_WAITALL) && uio->uio_resid <= so->so_rcv.sb_hiwat)) &&
1.21 christos 1003: m->m_nextpkt == 0 && (pr->pr_flags & PR_ATOMIC) == 0)) {
1.1 cgd 1004: #ifdef DIAGNOSTIC
1005: if (m == 0 && so->so_rcv.sb_cc)
1006: panic("receive 1");
1007: #endif
1008: if (so->so_error) {
1009: if (m)
1.15 mycroft 1010: goto dontblock;
1.1 cgd 1011: error = so->so_error;
1012: if ((flags & MSG_PEEK) == 0)
1013: so->so_error = 0;
1014: goto release;
1015: }
1016: if (so->so_state & SS_CANTRCVMORE) {
1017: if (m)
1.15 mycroft 1018: goto dontblock;
1.1 cgd 1019: else
1020: goto release;
1021: }
1022: for (; m; m = m->m_next)
1023: if (m->m_type == MT_OOBDATA || (m->m_flags & M_EOR)) {
1024: m = so->so_rcv.sb_mb;
1025: goto dontblock;
1026: }
1027: if ((so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING)) == 0 &&
1028: (so->so_proto->pr_flags & PR_CONNREQUIRED)) {
1029: error = ENOTCONN;
1030: goto release;
1031: }
1032: if (uio->uio_resid == 0)
1033: goto release;
1.15 mycroft 1034: if ((so->so_state & SS_NBIO) || (flags & MSG_DONTWAIT)) {
1.1 cgd 1035: error = EWOULDBLOCK;
1036: goto release;
1037: }
1.69 thorpej 1038: SBLASTRECORDCHK(&so->so_rcv, "soreceive sbwait 1");
1039: SBLASTMBUFCHK(&so->so_rcv, "soreceive sbwait 1");
1.1 cgd 1040: sbunlock(&so->so_rcv);
1041: error = sbwait(&so->so_rcv);
1042: splx(s);
1043: if (error)
1044: return (error);
1045: goto restart;
1046: }
1.54 lukem 1047: dontblock:
1.69 thorpej 1048: /*
1049: * On entry here, m points to the first record of the socket buffer.
1050: * While we process the initial mbufs containing address and control
1051: * info, we save a copy of m->m_nextpkt into nextrecord.
1052: */
1.102 jonathan 1053: if (p)
1054: p->p_stats->p_ru.ru_msgrcv++;
1.69 thorpej 1055: KASSERT(m == so->so_rcv.sb_mb);
1056: SBLASTRECORDCHK(&so->so_rcv, "soreceive 1");
1057: SBLASTMBUFCHK(&so->so_rcv, "soreceive 1");
1.1 cgd 1058: nextrecord = m->m_nextpkt;
1059: if (pr->pr_flags & PR_ADDR) {
1060: #ifdef DIAGNOSTIC
1061: if (m->m_type != MT_SONAME)
1062: panic("receive 1a");
1063: #endif
1.3 andrew 1064: orig_resid = 0;
1.1 cgd 1065: if (flags & MSG_PEEK) {
1066: if (paddr)
1067: *paddr = m_copy(m, 0, m->m_len);
1068: m = m->m_next;
1069: } else {
1070: sbfree(&so->so_rcv, m);
1.67 he 1071: mbuf_removed = 1;
1.1 cgd 1072: if (paddr) {
1073: *paddr = m;
1074: so->so_rcv.sb_mb = m->m_next;
1075: m->m_next = 0;
1076: m = so->so_rcv.sb_mb;
1077: } else {
1078: MFREE(m, so->so_rcv.sb_mb);
1079: m = so->so_rcv.sb_mb;
1080: }
1081: }
1082: }
1083: while (m && m->m_type == MT_CONTROL && error == 0) {
1084: if (flags & MSG_PEEK) {
1085: if (controlp)
1086: *controlp = m_copy(m, 0, m->m_len);
1087: m = m->m_next;
1088: } else {
1089: sbfree(&so->so_rcv, m);
1.67 he 1090: mbuf_removed = 1;
1.1 cgd 1091: if (controlp) {
1.102 jonathan 1092: struct domain *dom = pr->pr_domain;
1093: if (dom->dom_externalize && p &&
1.1 cgd 1094: mtod(m, struct cmsghdr *)->cmsg_type ==
1095: SCM_RIGHTS)
1.102 jonathan 1096: error = (*dom->dom_externalize)(m, p);
1.1 cgd 1097: *controlp = m;
1098: so->so_rcv.sb_mb = m->m_next;
1099: m->m_next = 0;
1100: m = so->so_rcv.sb_mb;
1101: } else {
1102: MFREE(m, so->so_rcv.sb_mb);
1103: m = so->so_rcv.sb_mb;
1104: }
1105: }
1.3 andrew 1106: if (controlp) {
1107: orig_resid = 0;
1.1 cgd 1108: controlp = &(*controlp)->m_next;
1.3 andrew 1109: }
1.1 cgd 1110: }
1.69 thorpej 1111:
1112: /*
1113: * If m is non-NULL, we have some data to read. From now on,
1114: * make sure to keep sb_lastrecord consistent when working on
1115: * the last packet on the chain (nextrecord == NULL) and we
1116: * change m->m_nextpkt.
1117: */
1.1 cgd 1118: if (m) {
1.69 thorpej 1119: if ((flags & MSG_PEEK) == 0) {
1.1 cgd 1120: m->m_nextpkt = nextrecord;
1.69 thorpej 1121: /*
1122: * If nextrecord == NULL (this is a single chain),
1123: * then sb_lastrecord may not be valid here if m
1124: * was changed earlier.
1125: */
1126: if (nextrecord == NULL) {
1127: KASSERT(so->so_rcv.sb_mb == m);
1128: so->so_rcv.sb_lastrecord = m;
1129: }
1130: }
1.1 cgd 1131: type = m->m_type;
1132: if (type == MT_OOBDATA)
1133: flags |= MSG_OOB;
1.69 thorpej 1134: } else {
1135: if ((flags & MSG_PEEK) == 0) {
1136: KASSERT(so->so_rcv.sb_mb == m);
1137: so->so_rcv.sb_mb = nextrecord;
1.70 thorpej 1138: SB_EMPTY_FIXUP(&so->so_rcv);
1.69 thorpej 1139: }
1.1 cgd 1140: }
1.69 thorpej 1141: SBLASTRECORDCHK(&so->so_rcv, "soreceive 2");
1142: SBLASTMBUFCHK(&so->so_rcv, "soreceive 2");
1143:
1.1 cgd 1144: moff = 0;
1145: offset = 0;
1146: while (m && uio->uio_resid > 0 && error == 0) {
1147: if (m->m_type == MT_OOBDATA) {
1148: if (type != MT_OOBDATA)
1149: break;
1150: } else if (type == MT_OOBDATA)
1151: break;
1152: #ifdef DIAGNOSTIC
1153: else if (m->m_type != MT_DATA && m->m_type != MT_HEADER)
1154: panic("receive 3");
1155: #endif
1156: so->so_state &= ~SS_RCVATMARK;
1157: len = uio->uio_resid;
1158: if (so->so_oobmark && len > so->so_oobmark - offset)
1159: len = so->so_oobmark - offset;
1160: if (len > m->m_len - moff)
1161: len = m->m_len - moff;
1162: /*
1163: * If mp is set, just pass back the mbufs.
1164: * Otherwise copy them out via the uio, then free.
1165: * Sockbuf must be consistent here (points to current mbuf,
1166: * it points to next record) when we drop priority;
1167: * we must note any additions to the sockbuf when we
1168: * block interrupts again.
1169: */
1170: if (mp == 0) {
1.69 thorpej 1171: SBLASTRECORDCHK(&so->so_rcv, "soreceive uiomove");
1172: SBLASTMBUFCHK(&so->so_rcv, "soreceive uiomove");
1.1 cgd 1173: splx(s);
1174: error = uiomove(mtod(m, caddr_t) + moff, (int)len, uio);
1.20 mycroft 1175: s = splsoftnet();
1.67 he 1176: if (error) {
1177: /*
1178: * If any part of the record has been removed
1179: * (such as the MT_SONAME mbuf, which will
1180: * happen when PR_ADDR, and thus also
1181: * PR_ATOMIC, is set), then drop the entire
1182: * record to maintain the atomicity of the
1183: * receive operation.
1184: *
1185: * This avoids a later panic("receive 1a")
1186: * when compiled with DIAGNOSTIC.
1187: */
1188: if (m && mbuf_removed
1189: && (pr->pr_flags & PR_ATOMIC))
1190: (void) sbdroprecord(&so->so_rcv);
1191:
1.57 jdolecek 1192: goto release;
1.67 he 1193: }
1.1 cgd 1194: } else
1195: uio->uio_resid -= len;
1196: if (len == m->m_len - moff) {
1197: if (m->m_flags & M_EOR)
1198: flags |= MSG_EOR;
1199: if (flags & MSG_PEEK) {
1200: m = m->m_next;
1201: moff = 0;
1202: } else {
1203: nextrecord = m->m_nextpkt;
1204: sbfree(&so->so_rcv, m);
1205: if (mp) {
1206: *mp = m;
1207: mp = &m->m_next;
1208: so->so_rcv.sb_mb = m = m->m_next;
1209: *mp = (struct mbuf *)0;
1210: } else {
1211: MFREE(m, so->so_rcv.sb_mb);
1212: m = so->so_rcv.sb_mb;
1213: }
1.69 thorpej 1214: /*
1215: * If m != NULL, we also know that
1216: * so->so_rcv.sb_mb != NULL.
1217: */
1218: KASSERT(so->so_rcv.sb_mb == m);
1219: if (m) {
1.1 cgd 1220: m->m_nextpkt = nextrecord;
1.69 thorpej 1221: if (nextrecord == NULL)
1222: so->so_rcv.sb_lastrecord = m;
1223: } else {
1224: so->so_rcv.sb_mb = nextrecord;
1.70 thorpej 1225: SB_EMPTY_FIXUP(&so->so_rcv);
1.69 thorpej 1226: }
1227: SBLASTRECORDCHK(&so->so_rcv, "soreceive 3");
1228: SBLASTMBUFCHK(&so->so_rcv, "soreceive 3");
1.1 cgd 1229: }
1230: } else {
1231: if (flags & MSG_PEEK)
1232: moff += len;
1233: else {
1234: if (mp)
1235: *mp = m_copym(m, 0, len, M_WAIT);
1236: m->m_data += len;
1237: m->m_len -= len;
1238: so->so_rcv.sb_cc -= len;
1239: }
1240: }
1241: if (so->so_oobmark) {
1242: if ((flags & MSG_PEEK) == 0) {
1243: so->so_oobmark -= len;
1244: if (so->so_oobmark == 0) {
1245: so->so_state |= SS_RCVATMARK;
1246: break;
1247: }
1.7 cgd 1248: } else {
1.1 cgd 1249: offset += len;
1.7 cgd 1250: if (offset == so->so_oobmark)
1251: break;
1252: }
1.1 cgd 1253: }
1254: if (flags & MSG_EOR)
1255: break;
1256: /*
1257: * If the MSG_WAITALL flag is set (for non-atomic socket),
1258: * we must not quit until "uio->uio_resid == 0" or an error
1259: * termination. If a signal/timeout occurs, return
1260: * with a short count but without error.
1261: * Keep sockbuf locked against other readers.
1262: */
1263: while (flags & MSG_WAITALL && m == 0 && uio->uio_resid > 0 &&
1.3 andrew 1264: !sosendallatonce(so) && !nextrecord) {
1.1 cgd 1265: if (so->so_error || so->so_state & SS_CANTRCVMORE)
1266: break;
1.68 matt 1267: /*
1268: * If we are peeking and the socket receive buffer is
1269: * full, stop since we can't get more data to peek at.
1270: */
1271: if ((flags & MSG_PEEK) && sbspace(&so->so_rcv) <= 0)
1272: break;
1273: /*
1274: * If we've drained the socket buffer, tell the
1275: * protocol in case it needs to do something to
1276: * get it filled again.
1277: */
1278: if ((pr->pr_flags & PR_WANTRCVD) && so->so_pcb)
1279: (*pr->pr_usrreq)(so, PRU_RCVD,
1280: (struct mbuf *)0,
1281: (struct mbuf *)(long)flags,
1.102 jonathan 1282: (struct mbuf *)0, p);
1.69 thorpej 1283: SBLASTRECORDCHK(&so->so_rcv, "soreceive sbwait 2");
1284: SBLASTMBUFCHK(&so->so_rcv, "soreceive sbwait 2");
1.1 cgd 1285: error = sbwait(&so->so_rcv);
1286: if (error) {
1287: sbunlock(&so->so_rcv);
1288: splx(s);
1289: return (0);
1290: }
1.21 christos 1291: if ((m = so->so_rcv.sb_mb) != NULL)
1.1 cgd 1292: nextrecord = m->m_nextpkt;
1293: }
1294: }
1.3 andrew 1295:
1296: if (m && pr->pr_flags & PR_ATOMIC) {
1297: flags |= MSG_TRUNC;
1298: if ((flags & MSG_PEEK) == 0)
1299: (void) sbdroprecord(&so->so_rcv);
1300: }
1.1 cgd 1301: if ((flags & MSG_PEEK) == 0) {
1.69 thorpej 1302: if (m == 0) {
1303: /*
1.70 thorpej 1304: * First part is an inline SB_EMPTY_FIXUP(). Second
1.69 thorpej 1305: * part makes sure sb_lastrecord is up-to-date if
1306: * there is still data in the socket buffer.
1307: */
1.1 cgd 1308: so->so_rcv.sb_mb = nextrecord;
1.69 thorpej 1309: if (so->so_rcv.sb_mb == NULL) {
1310: so->so_rcv.sb_mbtail = NULL;
1311: so->so_rcv.sb_lastrecord = NULL;
1312: } else if (nextrecord->m_nextpkt == NULL)
1313: so->so_rcv.sb_lastrecord = nextrecord;
1314: }
1315: SBLASTRECORDCHK(&so->so_rcv, "soreceive 4");
1316: SBLASTMBUFCHK(&so->so_rcv, "soreceive 4");
1.1 cgd 1317: if (pr->pr_flags & PR_WANTRCVD && so->so_pcb)
1.22 mycroft 1318: (*pr->pr_usrreq)(so, PRU_RCVD, (struct mbuf *)0,
1.102 jonathan 1319: (struct mbuf *)(long)flags, (struct mbuf *)0, p);
1.1 cgd 1320: }
1.3 andrew 1321: if (orig_resid == uio->uio_resid && orig_resid &&
1322: (flags & MSG_EOR) == 0 && (so->so_state & SS_CANTRCVMORE) == 0) {
1323: sbunlock(&so->so_rcv);
1324: splx(s);
1325: goto restart;
1326: }
1327:
1.1 cgd 1328: if (flagsp)
1329: *flagsp |= flags;
1.54 lukem 1330: release:
1.1 cgd 1331: sbunlock(&so->so_rcv);
1332: splx(s);
1333: return (error);
1334: }
1335:
1.14 mycroft 1336: int
1.54 lukem 1337: soshutdown(struct socket *so, int how)
1.1 cgd 1338: {
1.99 matt 1339: const struct protosw *pr;
1.34 kleink 1340:
1.54 lukem 1341: pr = so->so_proto;
1.34 kleink 1342: if (!(how == SHUT_RD || how == SHUT_WR || how == SHUT_RDWR))
1343: return (EINVAL);
1.1 cgd 1344:
1.34 kleink 1345: if (how == SHUT_RD || how == SHUT_RDWR)
1.1 cgd 1346: sorflush(so);
1.34 kleink 1347: if (how == SHUT_WR || how == SHUT_RDWR)
1.22 mycroft 1348: return (*pr->pr_usrreq)(so, PRU_SHUTDOWN, (struct mbuf *)0,
1.83 fvdl 1349: (struct mbuf *)0, (struct mbuf *)0, (struct proc *)0);
1.1 cgd 1350: return (0);
1351: }
1352:
1.14 mycroft 1353: void
1.54 lukem 1354: sorflush(struct socket *so)
1.1 cgd 1355: {
1.54 lukem 1356: struct sockbuf *sb, asb;
1.99 matt 1357: const struct protosw *pr;
1.54 lukem 1358: int s;
1.1 cgd 1359:
1.54 lukem 1360: sb = &so->so_rcv;
1361: pr = so->so_proto;
1.1 cgd 1362: sb->sb_flags |= SB_NOINTR;
1.15 mycroft 1363: (void) sblock(sb, M_WAITOK);
1.56 thorpej 1364: s = splnet();
1.1 cgd 1365: socantrcvmore(so);
1366: sbunlock(sb);
1367: asb = *sb;
1.86 wrstuden 1368: /*
1369: * Clear most of the sockbuf structure, but leave some of the
1370: * fields valid.
1371: */
1372: memset(&sb->sb_startzero, 0,
1373: sizeof(*sb) - offsetof(struct sockbuf, sb_startzero));
1.1 cgd 1374: splx(s);
1375: if (pr->pr_flags & PR_RIGHTS && pr->pr_domain->dom_dispose)
1376: (*pr->pr_domain->dom_dispose)(asb.sb_mb);
1.98 christos 1377: sbrelease(&asb, so);
1.1 cgd 1378: }
1379:
1.14 mycroft 1380: int
1.54 lukem 1381: sosetopt(struct socket *so, int level, int optname, struct mbuf *m0)
1.1 cgd 1382: {
1.54 lukem 1383: int error;
1384: struct mbuf *m;
1.1 cgd 1385:
1.54 lukem 1386: error = 0;
1387: m = m0;
1.1 cgd 1388: if (level != SOL_SOCKET) {
1389: if (so->so_proto && so->so_proto->pr_ctloutput)
1390: return ((*so->so_proto->pr_ctloutput)
1391: (PRCO_SETOPT, so, level, optname, &m0));
1392: error = ENOPROTOOPT;
1393: } else {
1394: switch (optname) {
1395:
1396: case SO_LINGER:
1.36 perry 1397: if (m == NULL || m->m_len != sizeof(struct linger)) {
1.1 cgd 1398: error = EINVAL;
1399: goto bad;
1400: }
1401: so->so_linger = mtod(m, struct linger *)->l_linger;
1402: /* fall thru... */
1403:
1404: case SO_DEBUG:
1405: case SO_KEEPALIVE:
1406: case SO_DONTROUTE:
1407: case SO_USELOOPBACK:
1408: case SO_BROADCAST:
1409: case SO_REUSEADDR:
1.15 mycroft 1410: case SO_REUSEPORT:
1.1 cgd 1411: case SO_OOBINLINE:
1.26 thorpej 1412: case SO_TIMESTAMP:
1.36 perry 1413: if (m == NULL || m->m_len < sizeof(int)) {
1.1 cgd 1414: error = EINVAL;
1415: goto bad;
1416: }
1417: if (*mtod(m, int *))
1418: so->so_options |= optname;
1419: else
1420: so->so_options &= ~optname;
1421: break;
1422:
1423: case SO_SNDBUF:
1424: case SO_RCVBUF:
1425: case SO_SNDLOWAT:
1426: case SO_RCVLOWAT:
1.28 thorpej 1427: {
1428: int optval;
1429:
1.36 perry 1430: if (m == NULL || m->m_len < sizeof(int)) {
1.1 cgd 1431: error = EINVAL;
1432: goto bad;
1433: }
1.28 thorpej 1434:
1435: /*
1436: * Values < 1 make no sense for any of these
1437: * options, so disallow them.
1438: */
1439: optval = *mtod(m, int *);
1440: if (optval < 1) {
1441: error = EINVAL;
1442: goto bad;
1443: }
1444:
1.1 cgd 1445: switch (optname) {
1446:
1447: case SO_SNDBUF:
1448: case SO_RCVBUF:
1449: if (sbreserve(optname == SO_SNDBUF ?
1450: &so->so_snd : &so->so_rcv,
1.98 christos 1451: (u_long) optval, so) == 0) {
1.1 cgd 1452: error = ENOBUFS;
1453: goto bad;
1454: }
1455: break;
1456:
1.28 thorpej 1457: /*
1458: * Make sure the low-water is never greater than
1459: * the high-water.
1460: */
1.1 cgd 1461: case SO_SNDLOWAT:
1.28 thorpej 1462: so->so_snd.sb_lowat =
1463: (optval > so->so_snd.sb_hiwat) ?
1464: so->so_snd.sb_hiwat : optval;
1.1 cgd 1465: break;
1466: case SO_RCVLOWAT:
1.28 thorpej 1467: so->so_rcv.sb_lowat =
1468: (optval > so->so_rcv.sb_hiwat) ?
1469: so->so_rcv.sb_hiwat : optval;
1.1 cgd 1470: break;
1471: }
1472: break;
1.28 thorpej 1473: }
1.1 cgd 1474:
1475: case SO_SNDTIMEO:
1476: case SO_RCVTIMEO:
1477: {
1478: struct timeval *tv;
1.104 yamt 1479: int val;
1.1 cgd 1480:
1.36 perry 1481: if (m == NULL || m->m_len < sizeof(*tv)) {
1.1 cgd 1482: error = EINVAL;
1483: goto bad;
1484: }
1485: tv = mtod(m, struct timeval *);
1.104 yamt 1486: if (tv->tv_sec > (INT_MAX - tv->tv_usec / tick) / hz) {
1.1 cgd 1487: error = EDOM;
1488: goto bad;
1489: }
1490: val = tv->tv_sec * hz + tv->tv_usec / tick;
1.74 itojun 1491: if (val == 0 && tv->tv_usec != 0)
1492: val = 1;
1.1 cgd 1493:
1494: switch (optname) {
1495:
1496: case SO_SNDTIMEO:
1497: so->so_snd.sb_timeo = val;
1498: break;
1499: case SO_RCVTIMEO:
1500: so->so_rcv.sb_timeo = val;
1501: break;
1502: }
1503: break;
1504: }
1505:
1506: default:
1507: error = ENOPROTOOPT;
1508: break;
1509: }
1.15 mycroft 1510: if (error == 0 && so->so_proto && so->so_proto->pr_ctloutput) {
1511: (void) ((*so->so_proto->pr_ctloutput)
1512: (PRCO_SETOPT, so, level, optname, &m0));
1513: m = NULL; /* freed by protocol */
1514: }
1.1 cgd 1515: }
1.54 lukem 1516: bad:
1.1 cgd 1517: if (m)
1518: (void) m_free(m);
1519: return (error);
1520: }
1521:
1.14 mycroft 1522: int
1.54 lukem 1523: sogetopt(struct socket *so, int level, int optname, struct mbuf **mp)
1.1 cgd 1524: {
1.54 lukem 1525: struct mbuf *m;
1.1 cgd 1526:
1527: if (level != SOL_SOCKET) {
1528: if (so->so_proto && so->so_proto->pr_ctloutput) {
1529: return ((*so->so_proto->pr_ctloutput)
1530: (PRCO_GETOPT, so, level, optname, mp));
1531: } else
1532: return (ENOPROTOOPT);
1533: } else {
1534: m = m_get(M_WAIT, MT_SOOPTS);
1.36 perry 1535: m->m_len = sizeof(int);
1.1 cgd 1536:
1537: switch (optname) {
1538:
1539: case SO_LINGER:
1.36 perry 1540: m->m_len = sizeof(struct linger);
1.1 cgd 1541: mtod(m, struct linger *)->l_onoff =
1542: so->so_options & SO_LINGER;
1543: mtod(m, struct linger *)->l_linger = so->so_linger;
1544: break;
1545:
1546: case SO_USELOOPBACK:
1547: case SO_DONTROUTE:
1548: case SO_DEBUG:
1549: case SO_KEEPALIVE:
1550: case SO_REUSEADDR:
1.15 mycroft 1551: case SO_REUSEPORT:
1.1 cgd 1552: case SO_BROADCAST:
1553: case SO_OOBINLINE:
1.26 thorpej 1554: case SO_TIMESTAMP:
1.1 cgd 1555: *mtod(m, int *) = so->so_options & optname;
1556: break;
1557:
1558: case SO_TYPE:
1559: *mtod(m, int *) = so->so_type;
1560: break;
1561:
1562: case SO_ERROR:
1563: *mtod(m, int *) = so->so_error;
1564: so->so_error = 0;
1565: break;
1566:
1567: case SO_SNDBUF:
1568: *mtod(m, int *) = so->so_snd.sb_hiwat;
1569: break;
1570:
1571: case SO_RCVBUF:
1572: *mtod(m, int *) = so->so_rcv.sb_hiwat;
1573: break;
1574:
1575: case SO_SNDLOWAT:
1576: *mtod(m, int *) = so->so_snd.sb_lowat;
1577: break;
1578:
1579: case SO_RCVLOWAT:
1580: *mtod(m, int *) = so->so_rcv.sb_lowat;
1581: break;
1582:
1583: case SO_SNDTIMEO:
1584: case SO_RCVTIMEO:
1585: {
1586: int val = (optname == SO_SNDTIMEO ?
1587: so->so_snd.sb_timeo : so->so_rcv.sb_timeo);
1588:
1589: m->m_len = sizeof(struct timeval);
1590: mtod(m, struct timeval *)->tv_sec = val / hz;
1591: mtod(m, struct timeval *)->tv_usec =
1.27 kleink 1592: (val % hz) * tick;
1.1 cgd 1593: break;
1594: }
1595:
1596: default:
1597: (void)m_free(m);
1598: return (ENOPROTOOPT);
1599: }
1600: *mp = m;
1601: return (0);
1602: }
1603: }
1604:
1.14 mycroft 1605: void
1.54 lukem 1606: sohasoutofband(struct socket *so)
1.1 cgd 1607: {
1.90 christos 1608: fownsignal(so->so_pgid, SIGURG, POLL_PRI, POLLPRI|POLLRDBAND, so);
1.2 cgd 1609: selwakeup(&so->so_rcv.sb_sel);
1.1 cgd 1610: }
1.72 jdolecek 1611:
1612: static void
1613: filt_sordetach(struct knote *kn)
1614: {
1615: struct socket *so;
1616:
1617: so = (struct socket *)kn->kn_fp->f_data;
1.73 christos 1618: SLIST_REMOVE(&so->so_rcv.sb_sel.sel_klist, kn, knote, kn_selnext);
1619: if (SLIST_EMPTY(&so->so_rcv.sb_sel.sel_klist))
1.72 jdolecek 1620: so->so_rcv.sb_flags &= ~SB_KNOTE;
1621: }
1622:
1623: /*ARGSUSED*/
1624: static int
1625: filt_soread(struct knote *kn, long hint)
1626: {
1627: struct socket *so;
1628:
1629: so = (struct socket *)kn->kn_fp->f_data;
1630: kn->kn_data = so->so_rcv.sb_cc;
1631: if (so->so_state & SS_CANTRCVMORE) {
1632: kn->kn_flags |= EV_EOF;
1633: kn->kn_fflags = so->so_error;
1634: return (1);
1635: }
1636: if (so->so_error) /* temporary udp error */
1637: return (1);
1638: if (kn->kn_sfflags & NOTE_LOWAT)
1639: return (kn->kn_data >= kn->kn_sdata);
1640: return (kn->kn_data >= so->so_rcv.sb_lowat);
1641: }
1642:
1643: static void
1644: filt_sowdetach(struct knote *kn)
1645: {
1646: struct socket *so;
1647:
1648: so = (struct socket *)kn->kn_fp->f_data;
1.73 christos 1649: SLIST_REMOVE(&so->so_snd.sb_sel.sel_klist, kn, knote, kn_selnext);
1650: if (SLIST_EMPTY(&so->so_snd.sb_sel.sel_klist))
1.72 jdolecek 1651: so->so_snd.sb_flags &= ~SB_KNOTE;
1652: }
1653:
1654: /*ARGSUSED*/
1655: static int
1656: filt_sowrite(struct knote *kn, long hint)
1657: {
1658: struct socket *so;
1659:
1660: so = (struct socket *)kn->kn_fp->f_data;
1661: kn->kn_data = sbspace(&so->so_snd);
1662: if (so->so_state & SS_CANTSENDMORE) {
1663: kn->kn_flags |= EV_EOF;
1664: kn->kn_fflags = so->so_error;
1665: return (1);
1666: }
1667: if (so->so_error) /* temporary udp error */
1668: return (1);
1669: if (((so->so_state & SS_ISCONNECTED) == 0) &&
1670: (so->so_proto->pr_flags & PR_CONNREQUIRED))
1671: return (0);
1672: if (kn->kn_sfflags & NOTE_LOWAT)
1673: return (kn->kn_data >= kn->kn_sdata);
1674: return (kn->kn_data >= so->so_snd.sb_lowat);
1675: }
1676:
1677: /*ARGSUSED*/
1678: static int
1679: filt_solisten(struct knote *kn, long hint)
1680: {
1681: struct socket *so;
1682:
1683: so = (struct socket *)kn->kn_fp->f_data;
1684:
1685: /*
1686: * Set kn_data to number of incoming connections, not
1687: * counting partial (incomplete) connections.
1688: */
1689: kn->kn_data = so->so_qlen;
1690: return (kn->kn_data > 0);
1691: }
1692:
1693: static const struct filterops solisten_filtops =
1694: { 1, NULL, filt_sordetach, filt_solisten };
1695: static const struct filterops soread_filtops =
1696: { 1, NULL, filt_sordetach, filt_soread };
1697: static const struct filterops sowrite_filtops =
1698: { 1, NULL, filt_sowdetach, filt_sowrite };
1699:
1700: int
1701: soo_kqfilter(struct file *fp, struct knote *kn)
1702: {
1703: struct socket *so;
1704: struct sockbuf *sb;
1705:
1706: so = (struct socket *)kn->kn_fp->f_data;
1707: switch (kn->kn_filter) {
1708: case EVFILT_READ:
1709: if (so->so_options & SO_ACCEPTCONN)
1710: kn->kn_fop = &solisten_filtops;
1711: else
1712: kn->kn_fop = &soread_filtops;
1713: sb = &so->so_rcv;
1714: break;
1715: case EVFILT_WRITE:
1716: kn->kn_fop = &sowrite_filtops;
1717: sb = &so->so_snd;
1718: break;
1719: default:
1720: return (1);
1721: }
1.73 christos 1722: SLIST_INSERT_HEAD(&sb->sb_sel.sel_klist, kn, kn_selnext);
1.72 jdolecek 1723: sb->sb_flags |= SB_KNOTE;
1724: return (0);
1725: }
1726:
1.94 yamt 1727: #include <sys/sysctl.h>
1728:
1729: static int sysctl_kern_somaxkva(SYSCTLFN_PROTO);
1730:
1731: /*
1732: * sysctl helper routine for kern.somaxkva. ensures that the given
1733: * value is not too small.
1734: * (XXX should we maybe make sure it's not too large as well?)
1735: */
1736: static int
1737: sysctl_kern_somaxkva(SYSCTLFN_ARGS)
1738: {
1739: int error, new_somaxkva;
1740: struct sysctlnode node;
1741: int s;
1742:
1743: new_somaxkva = somaxkva;
1744: node = *rnode;
1745: node.sysctl_data = &new_somaxkva;
1746: error = sysctl_lookup(SYSCTLFN_CALL(&node));
1747: if (error || newp == NULL)
1748: return (error);
1749:
1750: if (new_somaxkva < (16 * 1024 * 1024)) /* sanity */
1751: return (EINVAL);
1752:
1753: s = splvm();
1754: simple_lock(&so_pendfree_slock);
1755: somaxkva = new_somaxkva;
1756: wakeup(&socurkva);
1757: simple_unlock(&so_pendfree_slock);
1758: splx(s);
1759:
1760: return (error);
1761: }
1762:
1763: SYSCTL_SETUP(sysctl_kern_somaxkva_setup, "sysctl kern.somaxkva setup")
1764: {
1765:
1.97 atatat 1766: sysctl_createv(clog, 0, NULL, NULL,
1767: CTLFLAG_PERMANENT,
1768: CTLTYPE_NODE, "kern", NULL,
1769: NULL, 0, NULL, 0,
1770: CTL_KERN, CTL_EOL);
1771:
1772: sysctl_createv(clog, 0, NULL, NULL,
1773: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.103 atatat 1774: CTLTYPE_INT, "somaxkva",
1775: SYSCTL_DESCR("Maximum amount of kernel memory to be "
1776: "used for socket buffers"),
1.94 yamt 1777: sysctl_kern_somaxkva, 0, NULL, 0,
1778: CTL_KERN, KERN_SOMAXKVA, CTL_EOL);
1779: }
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