Annotation of src/sys/kern/uipc_socket.c, Revision 1.101
1.101 ! matt 1: /* $NetBSD: uipc_socket.c,v 1.100 2004/04/25 16:42:41 simonb 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>
1.101 ! matt 71: __KERNEL_RCSID(0, "$NetBSD: uipc_socket.c,v 1.100 2004/04/25 16:42:41 simonb 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);
410:
1.80 yamt 411: lva = sokvaalloc(len, so);
1.64 thorpej 412: if (lva == 0)
1.80 yamt 413: return 0;
1.64 thorpej 414:
1.83 fvdl 415: error = uvm_loan(&uio->uio_procp->p_vmspace->vm_map, sva, len,
1.79 thorpej 416: m->m_ext.ext_pgs, UVM_LOAN_TOPAGE);
1.64 thorpej 417: if (error) {
1.80 yamt 418: sokvafree(lva, len);
1.64 thorpej 419: return (0);
420: }
421:
422: for (i = 0, va = lva; i < npgs; i++, va += PAGE_SIZE)
1.79 thorpej 423: pmap_kenter_pa(va, VM_PAGE_TO_PHYS(m->m_ext.ext_pgs[i]),
424: VM_PROT_READ);
1.64 thorpej 425: pmap_update(pmap_kernel());
426:
427: lva += (vaddr_t) iov->iov_base & PAGE_MASK;
428:
429: MEXTADD(m, (caddr_t) lva, space, M_MBUF, soloanfree, so);
1.79 thorpej 430: m->m_flags |= M_EXT_PAGES | M_EXT_ROMAP;
1.64 thorpej 431:
432: uio->uio_resid -= space;
433: /* uio_offset not updated, not set/used for write(2) */
434: uio->uio_iov->iov_base = (caddr_t) uio->uio_iov->iov_base + space;
435: uio->uio_iov->iov_len -= space;
436: if (uio->uio_iov->iov_len == 0) {
437: uio->uio_iov++;
438: uio->uio_iovcnt--;
439: }
440:
441: return (space);
442: }
443:
1.1 cgd 444: /*
445: * Socket operation routines.
446: * These routines are called by the routines in
447: * sys_socket.c or from a system process, and
448: * implement the semantics of socket operations by
449: * switching out to the protocol specific routines.
450: */
451: /*ARGSUSED*/
1.3 andrew 452: int
1.54 lukem 453: socreate(int dom, struct socket **aso, int type, int proto)
1.1 cgd 454: {
1.54 lukem 455: struct proc *p;
1.99 matt 456: const struct protosw *prp;
1.54 lukem 457: struct socket *so;
458: int error, s;
1.1 cgd 459:
1.54 lukem 460: p = curproc; /* XXX */
1.1 cgd 461: if (proto)
462: prp = pffindproto(dom, proto, type);
463: else
464: prp = pffindtype(dom, type);
1.15 mycroft 465: if (prp == 0 || prp->pr_usrreq == 0)
1.1 cgd 466: return (EPROTONOSUPPORT);
467: if (prp->pr_type != type)
468: return (EPROTOTYPE);
1.39 matt 469: s = splsoftnet();
1.37 thorpej 470: so = pool_get(&socket_pool, PR_WAITOK);
1.38 perry 471: memset((caddr_t)so, 0, sizeof(*so));
1.31 thorpej 472: TAILQ_INIT(&so->so_q0);
473: TAILQ_INIT(&so->so_q);
1.1 cgd 474: so->so_type = type;
475: so->so_proto = prp;
1.33 matt 476: so->so_send = sosend;
477: so->so_receive = soreceive;
1.78 matt 478: #ifdef MBUFTRACE
479: so->so_rcv.sb_mowner = &prp->pr_domain->dom_mowner;
480: so->so_snd.sb_mowner = &prp->pr_domain->dom_mowner;
481: so->so_mowner = &prp->pr_domain->dom_mowner;
482: #endif
1.44 lukem 483: if (p != 0)
484: so->so_uid = p->p_ucred->cr_uid;
1.98 christos 485: else
486: so->so_uid = UID_MAX;
1.22 mycroft 487: error = (*prp->pr_usrreq)(so, PRU_ATTACH, (struct mbuf *)0,
1.83 fvdl 488: (struct mbuf *)(long)proto, (struct mbuf *)0, p);
1.1 cgd 489: if (error) {
490: so->so_state |= SS_NOFDREF;
491: sofree(so);
1.39 matt 492: splx(s);
1.1 cgd 493: return (error);
494: }
1.39 matt 495: splx(s);
1.1 cgd 496: *aso = so;
497: return (0);
498: }
499:
1.3 andrew 500: int
1.83 fvdl 501: sobind(struct socket *so, struct mbuf *nam, struct proc *p)
1.1 cgd 502: {
1.54 lukem 503: int s, error;
1.1 cgd 504:
1.54 lukem 505: s = splsoftnet();
1.22 mycroft 506: error = (*so->so_proto->pr_usrreq)(so, PRU_BIND, (struct mbuf *)0,
1.83 fvdl 507: nam, (struct mbuf *)0, p);
1.1 cgd 508: splx(s);
509: return (error);
510: }
511:
1.3 andrew 512: int
1.54 lukem 513: solisten(struct socket *so, int backlog)
1.1 cgd 514: {
1.54 lukem 515: int s, error;
1.1 cgd 516:
1.54 lukem 517: s = splsoftnet();
1.22 mycroft 518: error = (*so->so_proto->pr_usrreq)(so, PRU_LISTEN, (struct mbuf *)0,
1.83 fvdl 519: (struct mbuf *)0, (struct mbuf *)0, (struct proc *)0);
1.1 cgd 520: if (error) {
521: splx(s);
522: return (error);
523: }
1.63 matt 524: if (TAILQ_EMPTY(&so->so_q))
1.1 cgd 525: so->so_options |= SO_ACCEPTCONN;
526: if (backlog < 0)
527: backlog = 0;
1.49 jonathan 528: so->so_qlimit = min(backlog, somaxconn);
1.1 cgd 529: splx(s);
530: return (0);
531: }
532:
1.21 christos 533: void
1.54 lukem 534: sofree(struct socket *so)
1.1 cgd 535: {
536:
1.43 mycroft 537: if (so->so_pcb || (so->so_state & SS_NOFDREF) == 0)
1.1 cgd 538: return;
1.43 mycroft 539: if (so->so_head) {
540: /*
541: * We must not decommission a socket that's on the accept(2)
542: * queue. If we do, then accept(2) may hang after select(2)
543: * indicated that the listening socket was ready.
544: */
545: if (!soqremque(so, 0))
546: return;
547: }
1.98 christos 548: if (so->so_rcv.sb_hiwat)
549: (void)chgsbsize(so->so_uid, &so->so_rcv.sb_hiwat, 0,
550: RLIM_INFINITY);
551: if (so->so_snd.sb_hiwat)
552: (void)chgsbsize(so->so_uid, &so->so_snd.sb_hiwat, 0,
553: RLIM_INFINITY);
554: sbrelease(&so->so_snd, so);
1.1 cgd 555: sorflush(so);
1.37 thorpej 556: pool_put(&socket_pool, so);
1.1 cgd 557: }
558:
559: /*
560: * Close a socket on last file table reference removal.
561: * Initiate disconnect if connected.
562: * Free socket when disconnect complete.
563: */
1.3 andrew 564: int
1.54 lukem 565: soclose(struct socket *so)
1.1 cgd 566: {
1.54 lukem 567: struct socket *so2;
568: int s, error;
1.1 cgd 569:
1.54 lukem 570: error = 0;
571: s = splsoftnet(); /* conservative */
1.1 cgd 572: if (so->so_options & SO_ACCEPTCONN) {
1.63 matt 573: while ((so2 = TAILQ_FIRST(&so->so_q0)) != 0) {
1.42 mycroft 574: (void) soqremque(so2, 0);
1.41 mycroft 575: (void) soabort(so2);
576: }
1.63 matt 577: while ((so2 = TAILQ_FIRST(&so->so_q)) != 0) {
1.42 mycroft 578: (void) soqremque(so2, 1);
1.41 mycroft 579: (void) soabort(so2);
580: }
1.1 cgd 581: }
582: if (so->so_pcb == 0)
583: goto discard;
584: if (so->so_state & SS_ISCONNECTED) {
585: if ((so->so_state & SS_ISDISCONNECTING) == 0) {
586: error = sodisconnect(so);
587: if (error)
588: goto drop;
589: }
590: if (so->so_options & SO_LINGER) {
591: if ((so->so_state & SS_ISDISCONNECTING) &&
592: (so->so_state & SS_NBIO))
593: goto drop;
1.21 christos 594: while (so->so_state & SS_ISCONNECTED) {
595: error = tsleep((caddr_t)&so->so_timeo,
596: PSOCK | PCATCH, netcls,
1.30 thorpej 597: so->so_linger * hz);
1.21 christos 598: if (error)
1.1 cgd 599: break;
1.21 christos 600: }
1.1 cgd 601: }
602: }
1.54 lukem 603: drop:
1.1 cgd 604: if (so->so_pcb) {
1.22 mycroft 605: int error2 = (*so->so_proto->pr_usrreq)(so, PRU_DETACH,
606: (struct mbuf *)0, (struct mbuf *)0, (struct mbuf *)0,
1.83 fvdl 607: (struct proc *)0);
1.1 cgd 608: if (error == 0)
609: error = error2;
610: }
1.54 lukem 611: discard:
1.1 cgd 612: if (so->so_state & SS_NOFDREF)
613: panic("soclose: NOFDREF");
614: so->so_state |= SS_NOFDREF;
615: sofree(so);
616: splx(s);
617: return (error);
618: }
619:
620: /*
1.20 mycroft 621: * Must be called at splsoftnet...
1.1 cgd 622: */
1.3 andrew 623: int
1.54 lukem 624: soabort(struct socket *so)
1.1 cgd 625: {
626:
1.22 mycroft 627: return (*so->so_proto->pr_usrreq)(so, PRU_ABORT, (struct mbuf *)0,
1.83 fvdl 628: (struct mbuf *)0, (struct mbuf *)0, (struct proc *)0);
1.1 cgd 629: }
630:
1.3 andrew 631: int
1.54 lukem 632: soaccept(struct socket *so, struct mbuf *nam)
1.1 cgd 633: {
1.54 lukem 634: int s, error;
1.1 cgd 635:
1.54 lukem 636: error = 0;
637: s = splsoftnet();
1.1 cgd 638: if ((so->so_state & SS_NOFDREF) == 0)
639: panic("soaccept: !NOFDREF");
640: so->so_state &= ~SS_NOFDREF;
1.55 thorpej 641: if ((so->so_state & SS_ISDISCONNECTED) == 0 ||
642: (so->so_proto->pr_flags & PR_ABRTACPTDIS) == 0)
1.41 mycroft 643: error = (*so->so_proto->pr_usrreq)(so, PRU_ACCEPT,
1.83 fvdl 644: (struct mbuf *)0, nam, (struct mbuf *)0, (struct proc *)0);
1.41 mycroft 645: else
1.53 itojun 646: error = ECONNABORTED;
1.52 itojun 647:
1.1 cgd 648: splx(s);
649: return (error);
650: }
651:
1.3 andrew 652: int
1.54 lukem 653: soconnect(struct socket *so, struct mbuf *nam)
1.1 cgd 654: {
1.83 fvdl 655: struct proc *p;
1.54 lukem 656: int s, error;
1.1 cgd 657:
1.83 fvdl 658: p = curproc; /* XXX */
1.1 cgd 659: if (so->so_options & SO_ACCEPTCONN)
660: return (EOPNOTSUPP);
1.20 mycroft 661: s = splsoftnet();
1.1 cgd 662: /*
663: * If protocol is connection-based, can only connect once.
664: * Otherwise, if connected, try to disconnect first.
665: * This allows user to disconnect by connecting to, e.g.,
666: * a null address.
667: */
668: if (so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING) &&
669: ((so->so_proto->pr_flags & PR_CONNREQUIRED) ||
670: (error = sodisconnect(so))))
671: error = EISCONN;
672: else
673: error = (*so->so_proto->pr_usrreq)(so, PRU_CONNECT,
1.83 fvdl 674: (struct mbuf *)0, nam, (struct mbuf *)0, p);
1.1 cgd 675: splx(s);
676: return (error);
677: }
678:
1.3 andrew 679: int
1.54 lukem 680: soconnect2(struct socket *so1, struct socket *so2)
1.1 cgd 681: {
1.54 lukem 682: int s, error;
1.1 cgd 683:
1.54 lukem 684: s = splsoftnet();
1.22 mycroft 685: error = (*so1->so_proto->pr_usrreq)(so1, PRU_CONNECT2,
686: (struct mbuf *)0, (struct mbuf *)so2, (struct mbuf *)0,
1.83 fvdl 687: (struct proc *)0);
1.1 cgd 688: splx(s);
689: return (error);
690: }
691:
1.3 andrew 692: int
1.54 lukem 693: sodisconnect(struct socket *so)
1.1 cgd 694: {
1.54 lukem 695: int s, error;
1.1 cgd 696:
1.54 lukem 697: s = splsoftnet();
1.1 cgd 698: if ((so->so_state & SS_ISCONNECTED) == 0) {
699: error = ENOTCONN;
700: goto bad;
701: }
702: if (so->so_state & SS_ISDISCONNECTING) {
703: error = EALREADY;
704: goto bad;
705: }
1.22 mycroft 706: error = (*so->so_proto->pr_usrreq)(so, PRU_DISCONNECT,
707: (struct mbuf *)0, (struct mbuf *)0, (struct mbuf *)0,
1.83 fvdl 708: (struct proc *)0);
1.54 lukem 709: bad:
1.1 cgd 710: splx(s);
1.64 thorpej 711: sodopendfree(so);
1.1 cgd 712: return (error);
713: }
714:
1.15 mycroft 715: #define SBLOCKWAIT(f) (((f) & MSG_DONTWAIT) ? M_NOWAIT : M_WAITOK)
1.1 cgd 716: /*
717: * Send on a socket.
718: * If send must go all at once and message is larger than
719: * send buffering, then hard error.
720: * Lock against other senders.
721: * If must go all at once and not enough room now, then
722: * inform user that this would block and do nothing.
723: * Otherwise, if nonblocking, send as much as possible.
724: * The data to be sent is described by "uio" if nonzero,
725: * otherwise by the mbuf chain "top" (which must be null
726: * if uio is not). Data provided in mbuf chain must be small
727: * enough to send all at once.
728: *
729: * Returns nonzero on error, timeout or signal; callers
730: * must check for short counts if EINTR/ERESTART are returned.
731: * Data and control buffers are freed on return.
732: */
1.3 andrew 733: int
1.54 lukem 734: sosend(struct socket *so, struct mbuf *addr, struct uio *uio, struct mbuf *top,
735: struct mbuf *control, int flags)
1.1 cgd 736: {
1.54 lukem 737: struct proc *p;
738: struct mbuf **mp, *m;
1.58 jdolecek 739: long space, len, resid, clen, mlen;
740: int error, s, dontroute, atomic;
1.54 lukem 741:
1.64 thorpej 742: sodopendfree(so);
743:
1.83 fvdl 744: p = curproc; /* XXX */
1.54 lukem 745: clen = 0;
746: atomic = sosendallatonce(so) || top;
1.1 cgd 747: if (uio)
748: resid = uio->uio_resid;
749: else
750: resid = top->m_pkthdr.len;
1.7 cgd 751: /*
752: * In theory resid should be unsigned.
753: * However, space must be signed, as it might be less than 0
754: * if we over-committed, and we must use a signed comparison
755: * of space and resid. On the other hand, a negative resid
756: * causes us to loop sending 0-length segments to the protocol.
757: */
1.29 mycroft 758: if (resid < 0) {
759: error = EINVAL;
760: goto out;
761: }
1.1 cgd 762: dontroute =
763: (flags & MSG_DONTROUTE) && (so->so_options & SO_DONTROUTE) == 0 &&
764: (so->so_proto->pr_flags & PR_ATOMIC);
1.12 mycroft 765: p->p_stats->p_ru.ru_msgsnd++;
1.1 cgd 766: if (control)
767: clen = control->m_len;
768: #define snderr(errno) { error = errno; splx(s); goto release; }
769:
1.54 lukem 770: restart:
1.21 christos 771: if ((error = sblock(&so->so_snd, SBLOCKWAIT(flags))) != 0)
1.1 cgd 772: goto out;
773: do {
1.20 mycroft 774: s = splsoftnet();
1.1 cgd 775: if (so->so_state & SS_CANTSENDMORE)
776: snderr(EPIPE);
1.48 thorpej 777: if (so->so_error) {
778: error = so->so_error;
779: so->so_error = 0;
780: splx(s);
781: goto release;
782: }
1.1 cgd 783: if ((so->so_state & SS_ISCONNECTED) == 0) {
784: if (so->so_proto->pr_flags & PR_CONNREQUIRED) {
785: if ((so->so_state & SS_ISCONFIRMING) == 0 &&
786: !(resid == 0 && clen != 0))
787: snderr(ENOTCONN);
788: } else if (addr == 0)
789: snderr(EDESTADDRREQ);
790: }
791: space = sbspace(&so->so_snd);
792: if (flags & MSG_OOB)
793: space += 1024;
1.21 christos 794: if ((atomic && resid > so->so_snd.sb_hiwat) ||
1.11 mycroft 795: clen > so->so_snd.sb_hiwat)
796: snderr(EMSGSIZE);
1.96 mycroft 797: if (space < resid + clen &&
1.1 cgd 798: (atomic || space < so->so_snd.sb_lowat || space < clen)) {
799: if (so->so_state & SS_NBIO)
800: snderr(EWOULDBLOCK);
801: sbunlock(&so->so_snd);
802: error = sbwait(&so->so_snd);
803: splx(s);
804: if (error)
805: goto out;
806: goto restart;
807: }
808: splx(s);
809: mp = ⊤
810: space -= clen;
811: do {
1.45 tv 812: if (uio == NULL) {
813: /*
814: * Data is prepackaged in "top".
815: */
816: resid = 0;
817: if (flags & MSG_EOR)
818: top->m_flags |= M_EOR;
819: } else do {
820: if (top == 0) {
1.78 matt 821: m = m_gethdr(M_WAIT, MT_DATA);
1.45 tv 822: mlen = MHLEN;
823: m->m_pkthdr.len = 0;
824: m->m_pkthdr.rcvif = (struct ifnet *)0;
825: } else {
1.78 matt 826: m = m_get(M_WAIT, MT_DATA);
1.45 tv 827: mlen = MLEN;
828: }
1.78 matt 829: MCLAIM(m, so->so_snd.sb_mowner);
1.65 thorpej 830: if (use_sosend_loan &&
831: uio->uio_iov->iov_len >= SOCK_LOAN_THRESH &&
1.64 thorpej 832: space >= SOCK_LOAN_THRESH &&
833: (len = sosend_loan(so, uio, m,
834: space)) != 0) {
835: SOSEND_COUNTER_INCR(&sosend_loan_big);
836: space -= len;
837: goto have_data;
838: }
1.45 tv 839: if (resid >= MINCLSIZE && space >= MCLBYTES) {
1.64 thorpej 840: SOSEND_COUNTER_INCR(&sosend_copy_big);
1.78 matt 841: m_clget(m, M_WAIT);
1.45 tv 842: if ((m->m_flags & M_EXT) == 0)
843: goto nopages;
844: mlen = MCLBYTES;
845: if (atomic && top == 0) {
1.58 jdolecek 846: len = lmin(MCLBYTES - max_hdr,
1.54 lukem 847: resid);
1.45 tv 848: m->m_data += max_hdr;
849: } else
1.58 jdolecek 850: len = lmin(MCLBYTES, resid);
1.45 tv 851: space -= len;
852: } else {
1.64 thorpej 853: nopages:
854: SOSEND_COUNTER_INCR(&sosend_copy_small);
1.58 jdolecek 855: len = lmin(lmin(mlen, resid), space);
1.45 tv 856: space -= len;
857: /*
858: * For datagram protocols, leave room
859: * for protocol headers in first mbuf.
860: */
861: if (atomic && top == 0 && len < mlen)
862: MH_ALIGN(m, len);
863: }
1.54 lukem 864: error = uiomove(mtod(m, caddr_t), (int)len,
865: uio);
1.64 thorpej 866: have_data:
1.45 tv 867: resid = uio->uio_resid;
868: m->m_len = len;
869: *mp = m;
870: top->m_pkthdr.len += len;
871: if (error)
872: goto release;
873: mp = &m->m_next;
874: if (resid <= 0) {
875: if (flags & MSG_EOR)
876: top->m_flags |= M_EOR;
877: break;
878: }
879: } while (space > 0 && atomic);
1.46 sommerfe 880:
881: s = splsoftnet();
882:
883: if (so->so_state & SS_CANTSENDMORE)
884: snderr(EPIPE);
1.45 tv 885:
886: if (dontroute)
887: so->so_options |= SO_DONTROUTE;
888: if (resid > 0)
889: so->so_state |= SS_MORETOCOME;
1.46 sommerfe 890: error = (*so->so_proto->pr_usrreq)(so,
891: (flags & MSG_OOB) ? PRU_SENDOOB : PRU_SEND,
1.83 fvdl 892: top, addr, control, p);
1.45 tv 893: if (dontroute)
894: so->so_options &= ~SO_DONTROUTE;
895: if (resid > 0)
896: so->so_state &= ~SS_MORETOCOME;
1.46 sommerfe 897: splx(s);
898:
1.45 tv 899: clen = 0;
900: control = 0;
901: top = 0;
902: mp = ⊤
1.1 cgd 903: if (error)
904: goto release;
905: } while (resid && space > 0);
906: } while (resid);
907:
1.54 lukem 908: release:
1.1 cgd 909: sbunlock(&so->so_snd);
1.54 lukem 910: out:
1.1 cgd 911: if (top)
912: m_freem(top);
913: if (control)
914: m_freem(control);
915: return (error);
916: }
917:
918: /*
919: * Implement receive operations on a socket.
920: * We depend on the way that records are added to the sockbuf
921: * by sbappend*. In particular, each record (mbufs linked through m_next)
922: * must begin with an address if the protocol so specifies,
923: * followed by an optional mbuf or mbufs containing ancillary data,
924: * and then zero or more mbufs of data.
925: * In order to avoid blocking network interrupts for the entire time here,
926: * we splx() while doing the actual copy to user space.
927: * Although the sockbuf is locked, new data may still be appended,
928: * and thus we must maintain consistency of the sockbuf during that time.
929: *
930: * The caller may receive the data as a single mbuf chain by supplying
931: * an mbuf **mp0 for use in returning the chain. The uio is then used
932: * only for the count in uio_resid.
933: */
1.3 andrew 934: int
1.54 lukem 935: soreceive(struct socket *so, struct mbuf **paddr, struct uio *uio,
936: struct mbuf **mp0, struct mbuf **controlp, int *flagsp)
1.1 cgd 937: {
1.54 lukem 938: struct mbuf *m, **mp;
939: int flags, len, error, s, offset, moff, type, orig_resid;
1.99 matt 940: const struct protosw *pr;
1.54 lukem 941: struct mbuf *nextrecord;
1.67 he 942: int mbuf_removed = 0;
1.64 thorpej 943:
1.54 lukem 944: pr = so->so_proto;
1.1 cgd 945: mp = mp0;
1.54 lukem 946: type = 0;
947: orig_resid = uio->uio_resid;
1.1 cgd 948: if (paddr)
949: *paddr = 0;
950: if (controlp)
951: *controlp = 0;
952: if (flagsp)
953: flags = *flagsp &~ MSG_EOR;
954: else
955: flags = 0;
1.66 enami 956:
957: if ((flags & MSG_DONTWAIT) == 0)
958: sodopendfree(so);
959:
1.1 cgd 960: if (flags & MSG_OOB) {
961: m = m_get(M_WAIT, MT_DATA);
1.17 cgd 962: error = (*pr->pr_usrreq)(so, PRU_RCVOOB, m,
1.22 mycroft 963: (struct mbuf *)(long)(flags & MSG_PEEK), (struct mbuf *)0,
1.83 fvdl 964: (struct proc *)0);
1.1 cgd 965: if (error)
966: goto bad;
967: do {
968: error = uiomove(mtod(m, caddr_t),
969: (int) min(uio->uio_resid, m->m_len), uio);
970: m = m_free(m);
971: } while (uio->uio_resid && error == 0 && m);
1.54 lukem 972: bad:
1.1 cgd 973: if (m)
974: m_freem(m);
975: return (error);
976: }
977: if (mp)
978: *mp = (struct mbuf *)0;
979: if (so->so_state & SS_ISCONFIRMING && uio->uio_resid)
1.22 mycroft 980: (*pr->pr_usrreq)(so, PRU_RCVD, (struct mbuf *)0,
1.83 fvdl 981: (struct mbuf *)0, (struct mbuf *)0, (struct proc *)0);
1.1 cgd 982:
1.54 lukem 983: restart:
1.21 christos 984: if ((error = sblock(&so->so_rcv, SBLOCKWAIT(flags))) != 0)
1.1 cgd 985: return (error);
1.20 mycroft 986: s = splsoftnet();
1.1 cgd 987:
988: m = so->so_rcv.sb_mb;
989: /*
990: * If we have less data than requested, block awaiting more
991: * (subject to any timeout) if:
1.15 mycroft 992: * 1. the current count is less than the low water mark,
1.1 cgd 993: * 2. MSG_WAITALL is set, and it is possible to do the entire
1.15 mycroft 994: * receive operation at once if we block (resid <= hiwat), or
995: * 3. MSG_DONTWAIT is not set.
1.1 cgd 996: * If MSG_WAITALL is set but resid is larger than the receive buffer,
997: * we have to do the receive in sections, and thus risk returning
998: * a short count if a timeout or signal occurs after we start.
999: */
1.21 christos 1000: if (m == 0 || (((flags & MSG_DONTWAIT) == 0 &&
1.15 mycroft 1001: so->so_rcv.sb_cc < uio->uio_resid) &&
1.1 cgd 1002: (so->so_rcv.sb_cc < so->so_rcv.sb_lowat ||
1003: ((flags & MSG_WAITALL) && uio->uio_resid <= so->so_rcv.sb_hiwat)) &&
1.21 christos 1004: m->m_nextpkt == 0 && (pr->pr_flags & PR_ATOMIC) == 0)) {
1.1 cgd 1005: #ifdef DIAGNOSTIC
1006: if (m == 0 && so->so_rcv.sb_cc)
1007: panic("receive 1");
1008: #endif
1009: if (so->so_error) {
1010: if (m)
1.15 mycroft 1011: goto dontblock;
1.1 cgd 1012: error = so->so_error;
1013: if ((flags & MSG_PEEK) == 0)
1014: so->so_error = 0;
1015: goto release;
1016: }
1017: if (so->so_state & SS_CANTRCVMORE) {
1018: if (m)
1.15 mycroft 1019: goto dontblock;
1.1 cgd 1020: else
1021: goto release;
1022: }
1023: for (; m; m = m->m_next)
1024: if (m->m_type == MT_OOBDATA || (m->m_flags & M_EOR)) {
1025: m = so->so_rcv.sb_mb;
1026: goto dontblock;
1027: }
1028: if ((so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING)) == 0 &&
1029: (so->so_proto->pr_flags & PR_CONNREQUIRED)) {
1030: error = ENOTCONN;
1031: goto release;
1032: }
1033: if (uio->uio_resid == 0)
1034: goto release;
1.15 mycroft 1035: if ((so->so_state & SS_NBIO) || (flags & MSG_DONTWAIT)) {
1.1 cgd 1036: error = EWOULDBLOCK;
1037: goto release;
1038: }
1.69 thorpej 1039: SBLASTRECORDCHK(&so->so_rcv, "soreceive sbwait 1");
1040: SBLASTMBUFCHK(&so->so_rcv, "soreceive sbwait 1");
1.1 cgd 1041: sbunlock(&so->so_rcv);
1042: error = sbwait(&so->so_rcv);
1043: splx(s);
1044: if (error)
1045: return (error);
1046: goto restart;
1047: }
1.54 lukem 1048: dontblock:
1.69 thorpej 1049: /*
1050: * On entry here, m points to the first record of the socket buffer.
1051: * While we process the initial mbufs containing address and control
1052: * info, we save a copy of m->m_nextpkt into nextrecord.
1053: */
1.15 mycroft 1054: #ifdef notyet /* XXXX */
1.83 fvdl 1055: if (uio->uio_procp)
1056: uio->uio_procp->p_stats->p_ru.ru_msgrcv++;
1.15 mycroft 1057: #endif
1.69 thorpej 1058: KASSERT(m == so->so_rcv.sb_mb);
1059: SBLASTRECORDCHK(&so->so_rcv, "soreceive 1");
1060: SBLASTMBUFCHK(&so->so_rcv, "soreceive 1");
1.1 cgd 1061: nextrecord = m->m_nextpkt;
1062: if (pr->pr_flags & PR_ADDR) {
1063: #ifdef DIAGNOSTIC
1064: if (m->m_type != MT_SONAME)
1065: panic("receive 1a");
1066: #endif
1.3 andrew 1067: orig_resid = 0;
1.1 cgd 1068: if (flags & MSG_PEEK) {
1069: if (paddr)
1070: *paddr = m_copy(m, 0, m->m_len);
1071: m = m->m_next;
1072: } else {
1073: sbfree(&so->so_rcv, m);
1.67 he 1074: mbuf_removed = 1;
1.1 cgd 1075: if (paddr) {
1076: *paddr = m;
1077: so->so_rcv.sb_mb = m->m_next;
1078: m->m_next = 0;
1079: m = so->so_rcv.sb_mb;
1080: } else {
1081: MFREE(m, so->so_rcv.sb_mb);
1082: m = so->so_rcv.sb_mb;
1083: }
1084: }
1085: }
1086: while (m && m->m_type == MT_CONTROL && error == 0) {
1087: if (flags & MSG_PEEK) {
1088: if (controlp)
1089: *controlp = m_copy(m, 0, m->m_len);
1090: m = m->m_next;
1091: } else {
1092: sbfree(&so->so_rcv, m);
1.67 he 1093: mbuf_removed = 1;
1.1 cgd 1094: if (controlp) {
1095: if (pr->pr_domain->dom_externalize &&
1096: mtod(m, struct cmsghdr *)->cmsg_type ==
1097: SCM_RIGHTS)
1.45 tv 1098: error = (*pr->pr_domain->dom_externalize)(m);
1.1 cgd 1099: *controlp = m;
1100: so->so_rcv.sb_mb = m->m_next;
1101: m->m_next = 0;
1102: m = so->so_rcv.sb_mb;
1103: } else {
1104: MFREE(m, so->so_rcv.sb_mb);
1105: m = so->so_rcv.sb_mb;
1106: }
1107: }
1.3 andrew 1108: if (controlp) {
1109: orig_resid = 0;
1.1 cgd 1110: controlp = &(*controlp)->m_next;
1.3 andrew 1111: }
1.1 cgd 1112: }
1.69 thorpej 1113:
1114: /*
1115: * If m is non-NULL, we have some data to read. From now on,
1116: * make sure to keep sb_lastrecord consistent when working on
1117: * the last packet on the chain (nextrecord == NULL) and we
1118: * change m->m_nextpkt.
1119: */
1.1 cgd 1120: if (m) {
1.69 thorpej 1121: if ((flags & MSG_PEEK) == 0) {
1.1 cgd 1122: m->m_nextpkt = nextrecord;
1.69 thorpej 1123: /*
1124: * If nextrecord == NULL (this is a single chain),
1125: * then sb_lastrecord may not be valid here if m
1126: * was changed earlier.
1127: */
1128: if (nextrecord == NULL) {
1129: KASSERT(so->so_rcv.sb_mb == m);
1130: so->so_rcv.sb_lastrecord = m;
1131: }
1132: }
1.1 cgd 1133: type = m->m_type;
1134: if (type == MT_OOBDATA)
1135: flags |= MSG_OOB;
1.69 thorpej 1136: } else {
1137: if ((flags & MSG_PEEK) == 0) {
1138: KASSERT(so->so_rcv.sb_mb == m);
1139: so->so_rcv.sb_mb = nextrecord;
1.70 thorpej 1140: SB_EMPTY_FIXUP(&so->so_rcv);
1.69 thorpej 1141: }
1.1 cgd 1142: }
1.69 thorpej 1143: SBLASTRECORDCHK(&so->so_rcv, "soreceive 2");
1144: SBLASTMBUFCHK(&so->so_rcv, "soreceive 2");
1145:
1.1 cgd 1146: moff = 0;
1147: offset = 0;
1148: while (m && uio->uio_resid > 0 && error == 0) {
1149: if (m->m_type == MT_OOBDATA) {
1150: if (type != MT_OOBDATA)
1151: break;
1152: } else if (type == MT_OOBDATA)
1153: break;
1154: #ifdef DIAGNOSTIC
1155: else if (m->m_type != MT_DATA && m->m_type != MT_HEADER)
1156: panic("receive 3");
1157: #endif
1158: so->so_state &= ~SS_RCVATMARK;
1159: len = uio->uio_resid;
1160: if (so->so_oobmark && len > so->so_oobmark - offset)
1161: len = so->so_oobmark - offset;
1162: if (len > m->m_len - moff)
1163: len = m->m_len - moff;
1164: /*
1165: * If mp is set, just pass back the mbufs.
1166: * Otherwise copy them out via the uio, then free.
1167: * Sockbuf must be consistent here (points to current mbuf,
1168: * it points to next record) when we drop priority;
1169: * we must note any additions to the sockbuf when we
1170: * block interrupts again.
1171: */
1172: if (mp == 0) {
1.69 thorpej 1173: SBLASTRECORDCHK(&so->so_rcv, "soreceive uiomove");
1174: SBLASTMBUFCHK(&so->so_rcv, "soreceive uiomove");
1.1 cgd 1175: splx(s);
1176: error = uiomove(mtod(m, caddr_t) + moff, (int)len, uio);
1.20 mycroft 1177: s = splsoftnet();
1.67 he 1178: if (error) {
1179: /*
1180: * If any part of the record has been removed
1181: * (such as the MT_SONAME mbuf, which will
1182: * happen when PR_ADDR, and thus also
1183: * PR_ATOMIC, is set), then drop the entire
1184: * record to maintain the atomicity of the
1185: * receive operation.
1186: *
1187: * This avoids a later panic("receive 1a")
1188: * when compiled with DIAGNOSTIC.
1189: */
1190: if (m && mbuf_removed
1191: && (pr->pr_flags & PR_ATOMIC))
1192: (void) sbdroprecord(&so->so_rcv);
1193:
1.57 jdolecek 1194: goto release;
1.67 he 1195: }
1.1 cgd 1196: } else
1197: uio->uio_resid -= len;
1198: if (len == m->m_len - moff) {
1199: if (m->m_flags & M_EOR)
1200: flags |= MSG_EOR;
1201: if (flags & MSG_PEEK) {
1202: m = m->m_next;
1203: moff = 0;
1204: } else {
1205: nextrecord = m->m_nextpkt;
1206: sbfree(&so->so_rcv, m);
1207: if (mp) {
1208: *mp = m;
1209: mp = &m->m_next;
1210: so->so_rcv.sb_mb = m = m->m_next;
1211: *mp = (struct mbuf *)0;
1212: } else {
1213: MFREE(m, so->so_rcv.sb_mb);
1214: m = so->so_rcv.sb_mb;
1215: }
1.69 thorpej 1216: /*
1217: * If m != NULL, we also know that
1218: * so->so_rcv.sb_mb != NULL.
1219: */
1220: KASSERT(so->so_rcv.sb_mb == m);
1221: if (m) {
1.1 cgd 1222: m->m_nextpkt = nextrecord;
1.69 thorpej 1223: if (nextrecord == NULL)
1224: so->so_rcv.sb_lastrecord = m;
1225: } else {
1226: so->so_rcv.sb_mb = nextrecord;
1.70 thorpej 1227: SB_EMPTY_FIXUP(&so->so_rcv);
1.69 thorpej 1228: }
1229: SBLASTRECORDCHK(&so->so_rcv, "soreceive 3");
1230: SBLASTMBUFCHK(&so->so_rcv, "soreceive 3");
1.1 cgd 1231: }
1232: } else {
1233: if (flags & MSG_PEEK)
1234: moff += len;
1235: else {
1236: if (mp)
1237: *mp = m_copym(m, 0, len, M_WAIT);
1238: m->m_data += len;
1239: m->m_len -= len;
1240: so->so_rcv.sb_cc -= len;
1241: }
1242: }
1243: if (so->so_oobmark) {
1244: if ((flags & MSG_PEEK) == 0) {
1245: so->so_oobmark -= len;
1246: if (so->so_oobmark == 0) {
1247: so->so_state |= SS_RCVATMARK;
1248: break;
1249: }
1.7 cgd 1250: } else {
1.1 cgd 1251: offset += len;
1.7 cgd 1252: if (offset == so->so_oobmark)
1253: break;
1254: }
1.1 cgd 1255: }
1256: if (flags & MSG_EOR)
1257: break;
1258: /*
1259: * If the MSG_WAITALL flag is set (for non-atomic socket),
1260: * we must not quit until "uio->uio_resid == 0" or an error
1261: * termination. If a signal/timeout occurs, return
1262: * with a short count but without error.
1263: * Keep sockbuf locked against other readers.
1264: */
1265: while (flags & MSG_WAITALL && m == 0 && uio->uio_resid > 0 &&
1.3 andrew 1266: !sosendallatonce(so) && !nextrecord) {
1.1 cgd 1267: if (so->so_error || so->so_state & SS_CANTRCVMORE)
1268: break;
1.68 matt 1269: /*
1270: * If we are peeking and the socket receive buffer is
1271: * full, stop since we can't get more data to peek at.
1272: */
1273: if ((flags & MSG_PEEK) && sbspace(&so->so_rcv) <= 0)
1274: break;
1275: /*
1276: * If we've drained the socket buffer, tell the
1277: * protocol in case it needs to do something to
1278: * get it filled again.
1279: */
1280: if ((pr->pr_flags & PR_WANTRCVD) && so->so_pcb)
1281: (*pr->pr_usrreq)(so, PRU_RCVD,
1282: (struct mbuf *)0,
1283: (struct mbuf *)(long)flags,
1284: (struct mbuf *)0,
1.83 fvdl 1285: (struct proc *)0);
1.69 thorpej 1286: SBLASTRECORDCHK(&so->so_rcv, "soreceive sbwait 2");
1287: SBLASTMBUFCHK(&so->so_rcv, "soreceive sbwait 2");
1.1 cgd 1288: error = sbwait(&so->so_rcv);
1289: if (error) {
1290: sbunlock(&so->so_rcv);
1291: splx(s);
1292: return (0);
1293: }
1.21 christos 1294: if ((m = so->so_rcv.sb_mb) != NULL)
1.1 cgd 1295: nextrecord = m->m_nextpkt;
1296: }
1297: }
1.3 andrew 1298:
1299: if (m && pr->pr_flags & PR_ATOMIC) {
1300: flags |= MSG_TRUNC;
1301: if ((flags & MSG_PEEK) == 0)
1302: (void) sbdroprecord(&so->so_rcv);
1303: }
1.1 cgd 1304: if ((flags & MSG_PEEK) == 0) {
1.69 thorpej 1305: if (m == 0) {
1306: /*
1.70 thorpej 1307: * First part is an inline SB_EMPTY_FIXUP(). Second
1.69 thorpej 1308: * part makes sure sb_lastrecord is up-to-date if
1309: * there is still data in the socket buffer.
1310: */
1.1 cgd 1311: so->so_rcv.sb_mb = nextrecord;
1.69 thorpej 1312: if (so->so_rcv.sb_mb == NULL) {
1313: so->so_rcv.sb_mbtail = NULL;
1314: so->so_rcv.sb_lastrecord = NULL;
1315: } else if (nextrecord->m_nextpkt == NULL)
1316: so->so_rcv.sb_lastrecord = nextrecord;
1317: }
1318: SBLASTRECORDCHK(&so->so_rcv, "soreceive 4");
1319: SBLASTMBUFCHK(&so->so_rcv, "soreceive 4");
1.1 cgd 1320: if (pr->pr_flags & PR_WANTRCVD && so->so_pcb)
1.22 mycroft 1321: (*pr->pr_usrreq)(so, PRU_RCVD, (struct mbuf *)0,
1322: (struct mbuf *)(long)flags, (struct mbuf *)0,
1.83 fvdl 1323: (struct proc *)0);
1.1 cgd 1324: }
1.3 andrew 1325: if (orig_resid == uio->uio_resid && orig_resid &&
1326: (flags & MSG_EOR) == 0 && (so->so_state & SS_CANTRCVMORE) == 0) {
1327: sbunlock(&so->so_rcv);
1328: splx(s);
1329: goto restart;
1330: }
1331:
1.1 cgd 1332: if (flagsp)
1333: *flagsp |= flags;
1.54 lukem 1334: release:
1.1 cgd 1335: sbunlock(&so->so_rcv);
1336: splx(s);
1337: return (error);
1338: }
1339:
1.14 mycroft 1340: int
1.54 lukem 1341: soshutdown(struct socket *so, int how)
1.1 cgd 1342: {
1.99 matt 1343: const struct protosw *pr;
1.34 kleink 1344:
1.54 lukem 1345: pr = so->so_proto;
1.34 kleink 1346: if (!(how == SHUT_RD || how == SHUT_WR || how == SHUT_RDWR))
1347: return (EINVAL);
1.1 cgd 1348:
1.34 kleink 1349: if (how == SHUT_RD || how == SHUT_RDWR)
1.1 cgd 1350: sorflush(so);
1.34 kleink 1351: if (how == SHUT_WR || how == SHUT_RDWR)
1.22 mycroft 1352: return (*pr->pr_usrreq)(so, PRU_SHUTDOWN, (struct mbuf *)0,
1.83 fvdl 1353: (struct mbuf *)0, (struct mbuf *)0, (struct proc *)0);
1.1 cgd 1354: return (0);
1355: }
1356:
1.14 mycroft 1357: void
1.54 lukem 1358: sorflush(struct socket *so)
1.1 cgd 1359: {
1.54 lukem 1360: struct sockbuf *sb, asb;
1.99 matt 1361: const struct protosw *pr;
1.54 lukem 1362: int s;
1.1 cgd 1363:
1.54 lukem 1364: sb = &so->so_rcv;
1365: pr = so->so_proto;
1.1 cgd 1366: sb->sb_flags |= SB_NOINTR;
1.15 mycroft 1367: (void) sblock(sb, M_WAITOK);
1.56 thorpej 1368: s = splnet();
1.1 cgd 1369: socantrcvmore(so);
1370: sbunlock(sb);
1371: asb = *sb;
1.86 wrstuden 1372: /*
1373: * Clear most of the sockbuf structure, but leave some of the
1374: * fields valid.
1375: */
1376: memset(&sb->sb_startzero, 0,
1377: sizeof(*sb) - offsetof(struct sockbuf, sb_startzero));
1.1 cgd 1378: splx(s);
1379: if (pr->pr_flags & PR_RIGHTS && pr->pr_domain->dom_dispose)
1380: (*pr->pr_domain->dom_dispose)(asb.sb_mb);
1.98 christos 1381: sbrelease(&asb, so);
1.1 cgd 1382: }
1383:
1.14 mycroft 1384: int
1.54 lukem 1385: sosetopt(struct socket *so, int level, int optname, struct mbuf *m0)
1.1 cgd 1386: {
1.54 lukem 1387: int error;
1388: struct mbuf *m;
1.1 cgd 1389:
1.54 lukem 1390: error = 0;
1391: m = m0;
1.1 cgd 1392: if (level != SOL_SOCKET) {
1393: if (so->so_proto && so->so_proto->pr_ctloutput)
1394: return ((*so->so_proto->pr_ctloutput)
1395: (PRCO_SETOPT, so, level, optname, &m0));
1396: error = ENOPROTOOPT;
1397: } else {
1398: switch (optname) {
1399:
1400: case SO_LINGER:
1.36 perry 1401: if (m == NULL || m->m_len != sizeof(struct linger)) {
1.1 cgd 1402: error = EINVAL;
1403: goto bad;
1404: }
1405: so->so_linger = mtod(m, struct linger *)->l_linger;
1406: /* fall thru... */
1407:
1408: case SO_DEBUG:
1409: case SO_KEEPALIVE:
1410: case SO_DONTROUTE:
1411: case SO_USELOOPBACK:
1412: case SO_BROADCAST:
1413: case SO_REUSEADDR:
1.15 mycroft 1414: case SO_REUSEPORT:
1.1 cgd 1415: case SO_OOBINLINE:
1.26 thorpej 1416: case SO_TIMESTAMP:
1.36 perry 1417: if (m == NULL || m->m_len < sizeof(int)) {
1.1 cgd 1418: error = EINVAL;
1419: goto bad;
1420: }
1421: if (*mtod(m, int *))
1422: so->so_options |= optname;
1423: else
1424: so->so_options &= ~optname;
1425: break;
1426:
1427: case SO_SNDBUF:
1428: case SO_RCVBUF:
1429: case SO_SNDLOWAT:
1430: case SO_RCVLOWAT:
1.28 thorpej 1431: {
1432: int optval;
1433:
1.36 perry 1434: if (m == NULL || m->m_len < sizeof(int)) {
1.1 cgd 1435: error = EINVAL;
1436: goto bad;
1437: }
1.28 thorpej 1438:
1439: /*
1440: * Values < 1 make no sense for any of these
1441: * options, so disallow them.
1442: */
1443: optval = *mtod(m, int *);
1444: if (optval < 1) {
1445: error = EINVAL;
1446: goto bad;
1447: }
1448:
1.1 cgd 1449: switch (optname) {
1450:
1451: case SO_SNDBUF:
1452: case SO_RCVBUF:
1453: if (sbreserve(optname == SO_SNDBUF ?
1454: &so->so_snd : &so->so_rcv,
1.98 christos 1455: (u_long) optval, so) == 0) {
1.1 cgd 1456: error = ENOBUFS;
1457: goto bad;
1458: }
1459: break;
1460:
1.28 thorpej 1461: /*
1462: * Make sure the low-water is never greater than
1463: * the high-water.
1464: */
1.1 cgd 1465: case SO_SNDLOWAT:
1.28 thorpej 1466: so->so_snd.sb_lowat =
1467: (optval > so->so_snd.sb_hiwat) ?
1468: so->so_snd.sb_hiwat : optval;
1.1 cgd 1469: break;
1470: case SO_RCVLOWAT:
1.28 thorpej 1471: so->so_rcv.sb_lowat =
1472: (optval > so->so_rcv.sb_hiwat) ?
1473: so->so_rcv.sb_hiwat : optval;
1.1 cgd 1474: break;
1475: }
1476: break;
1.28 thorpej 1477: }
1.1 cgd 1478:
1479: case SO_SNDTIMEO:
1480: case SO_RCVTIMEO:
1481: {
1482: struct timeval *tv;
1483: short val;
1484:
1.36 perry 1485: if (m == NULL || m->m_len < sizeof(*tv)) {
1.1 cgd 1486: error = EINVAL;
1487: goto bad;
1488: }
1489: tv = mtod(m, struct timeval *);
1.75 itojun 1490: if (tv->tv_sec > (SHRT_MAX - tv->tv_usec / tick) / hz) {
1.1 cgd 1491: error = EDOM;
1492: goto bad;
1493: }
1494: val = tv->tv_sec * hz + tv->tv_usec / tick;
1.74 itojun 1495: if (val == 0 && tv->tv_usec != 0)
1496: val = 1;
1.1 cgd 1497:
1498: switch (optname) {
1499:
1500: case SO_SNDTIMEO:
1501: so->so_snd.sb_timeo = val;
1502: break;
1503: case SO_RCVTIMEO:
1504: so->so_rcv.sb_timeo = val;
1505: break;
1506: }
1507: break;
1508: }
1509:
1510: default:
1511: error = ENOPROTOOPT;
1512: break;
1513: }
1.15 mycroft 1514: if (error == 0 && so->so_proto && so->so_proto->pr_ctloutput) {
1515: (void) ((*so->so_proto->pr_ctloutput)
1516: (PRCO_SETOPT, so, level, optname, &m0));
1517: m = NULL; /* freed by protocol */
1518: }
1.1 cgd 1519: }
1.54 lukem 1520: bad:
1.1 cgd 1521: if (m)
1522: (void) m_free(m);
1523: return (error);
1524: }
1525:
1.14 mycroft 1526: int
1.54 lukem 1527: sogetopt(struct socket *so, int level, int optname, struct mbuf **mp)
1.1 cgd 1528: {
1.54 lukem 1529: struct mbuf *m;
1.1 cgd 1530:
1531: if (level != SOL_SOCKET) {
1532: if (so->so_proto && so->so_proto->pr_ctloutput) {
1533: return ((*so->so_proto->pr_ctloutput)
1534: (PRCO_GETOPT, so, level, optname, mp));
1535: } else
1536: return (ENOPROTOOPT);
1537: } else {
1538: m = m_get(M_WAIT, MT_SOOPTS);
1.36 perry 1539: m->m_len = sizeof(int);
1.1 cgd 1540:
1541: switch (optname) {
1542:
1543: case SO_LINGER:
1.36 perry 1544: m->m_len = sizeof(struct linger);
1.1 cgd 1545: mtod(m, struct linger *)->l_onoff =
1546: so->so_options & SO_LINGER;
1547: mtod(m, struct linger *)->l_linger = so->so_linger;
1548: break;
1549:
1550: case SO_USELOOPBACK:
1551: case SO_DONTROUTE:
1552: case SO_DEBUG:
1553: case SO_KEEPALIVE:
1554: case SO_REUSEADDR:
1.15 mycroft 1555: case SO_REUSEPORT:
1.1 cgd 1556: case SO_BROADCAST:
1557: case SO_OOBINLINE:
1.26 thorpej 1558: case SO_TIMESTAMP:
1.1 cgd 1559: *mtod(m, int *) = so->so_options & optname;
1560: break;
1561:
1562: case SO_TYPE:
1563: *mtod(m, int *) = so->so_type;
1564: break;
1565:
1566: case SO_ERROR:
1567: *mtod(m, int *) = so->so_error;
1568: so->so_error = 0;
1569: break;
1570:
1571: case SO_SNDBUF:
1572: *mtod(m, int *) = so->so_snd.sb_hiwat;
1573: break;
1574:
1575: case SO_RCVBUF:
1576: *mtod(m, int *) = so->so_rcv.sb_hiwat;
1577: break;
1578:
1579: case SO_SNDLOWAT:
1580: *mtod(m, int *) = so->so_snd.sb_lowat;
1581: break;
1582:
1583: case SO_RCVLOWAT:
1584: *mtod(m, int *) = so->so_rcv.sb_lowat;
1585: break;
1586:
1587: case SO_SNDTIMEO:
1588: case SO_RCVTIMEO:
1589: {
1590: int val = (optname == SO_SNDTIMEO ?
1591: so->so_snd.sb_timeo : so->so_rcv.sb_timeo);
1592:
1593: m->m_len = sizeof(struct timeval);
1594: mtod(m, struct timeval *)->tv_sec = val / hz;
1595: mtod(m, struct timeval *)->tv_usec =
1.27 kleink 1596: (val % hz) * tick;
1.1 cgd 1597: break;
1598: }
1599:
1600: default:
1601: (void)m_free(m);
1602: return (ENOPROTOOPT);
1603: }
1604: *mp = m;
1605: return (0);
1606: }
1607: }
1608:
1.14 mycroft 1609: void
1.54 lukem 1610: sohasoutofband(struct socket *so)
1.1 cgd 1611: {
1.90 christos 1612: fownsignal(so->so_pgid, SIGURG, POLL_PRI, POLLPRI|POLLRDBAND, so);
1.2 cgd 1613: selwakeup(&so->so_rcv.sb_sel);
1.1 cgd 1614: }
1.72 jdolecek 1615:
1616: static void
1617: filt_sordetach(struct knote *kn)
1618: {
1619: struct socket *so;
1620:
1621: so = (struct socket *)kn->kn_fp->f_data;
1.73 christos 1622: SLIST_REMOVE(&so->so_rcv.sb_sel.sel_klist, kn, knote, kn_selnext);
1623: if (SLIST_EMPTY(&so->so_rcv.sb_sel.sel_klist))
1.72 jdolecek 1624: so->so_rcv.sb_flags &= ~SB_KNOTE;
1625: }
1626:
1627: /*ARGSUSED*/
1628: static int
1629: filt_soread(struct knote *kn, long hint)
1630: {
1631: struct socket *so;
1632:
1633: so = (struct socket *)kn->kn_fp->f_data;
1634: kn->kn_data = so->so_rcv.sb_cc;
1635: if (so->so_state & SS_CANTRCVMORE) {
1636: kn->kn_flags |= EV_EOF;
1637: kn->kn_fflags = so->so_error;
1638: return (1);
1639: }
1640: if (so->so_error) /* temporary udp error */
1641: return (1);
1642: if (kn->kn_sfflags & NOTE_LOWAT)
1643: return (kn->kn_data >= kn->kn_sdata);
1644: return (kn->kn_data >= so->so_rcv.sb_lowat);
1645: }
1646:
1647: static void
1648: filt_sowdetach(struct knote *kn)
1649: {
1650: struct socket *so;
1651:
1652: so = (struct socket *)kn->kn_fp->f_data;
1.73 christos 1653: SLIST_REMOVE(&so->so_snd.sb_sel.sel_klist, kn, knote, kn_selnext);
1654: if (SLIST_EMPTY(&so->so_snd.sb_sel.sel_klist))
1.72 jdolecek 1655: so->so_snd.sb_flags &= ~SB_KNOTE;
1656: }
1657:
1658: /*ARGSUSED*/
1659: static int
1660: filt_sowrite(struct knote *kn, long hint)
1661: {
1662: struct socket *so;
1663:
1664: so = (struct socket *)kn->kn_fp->f_data;
1665: kn->kn_data = sbspace(&so->so_snd);
1666: if (so->so_state & SS_CANTSENDMORE) {
1667: kn->kn_flags |= EV_EOF;
1668: kn->kn_fflags = so->so_error;
1669: return (1);
1670: }
1671: if (so->so_error) /* temporary udp error */
1672: return (1);
1673: if (((so->so_state & SS_ISCONNECTED) == 0) &&
1674: (so->so_proto->pr_flags & PR_CONNREQUIRED))
1675: return (0);
1676: if (kn->kn_sfflags & NOTE_LOWAT)
1677: return (kn->kn_data >= kn->kn_sdata);
1678: return (kn->kn_data >= so->so_snd.sb_lowat);
1679: }
1680:
1681: /*ARGSUSED*/
1682: static int
1683: filt_solisten(struct knote *kn, long hint)
1684: {
1685: struct socket *so;
1686:
1687: so = (struct socket *)kn->kn_fp->f_data;
1688:
1689: /*
1690: * Set kn_data to number of incoming connections, not
1691: * counting partial (incomplete) connections.
1692: */
1693: kn->kn_data = so->so_qlen;
1694: return (kn->kn_data > 0);
1695: }
1696:
1697: static const struct filterops solisten_filtops =
1698: { 1, NULL, filt_sordetach, filt_solisten };
1699: static const struct filterops soread_filtops =
1700: { 1, NULL, filt_sordetach, filt_soread };
1701: static const struct filterops sowrite_filtops =
1702: { 1, NULL, filt_sowdetach, filt_sowrite };
1703:
1704: int
1705: soo_kqfilter(struct file *fp, struct knote *kn)
1706: {
1707: struct socket *so;
1708: struct sockbuf *sb;
1709:
1710: so = (struct socket *)kn->kn_fp->f_data;
1711: switch (kn->kn_filter) {
1712: case EVFILT_READ:
1713: if (so->so_options & SO_ACCEPTCONN)
1714: kn->kn_fop = &solisten_filtops;
1715: else
1716: kn->kn_fop = &soread_filtops;
1717: sb = &so->so_rcv;
1718: break;
1719: case EVFILT_WRITE:
1720: kn->kn_fop = &sowrite_filtops;
1721: sb = &so->so_snd;
1722: break;
1723: default:
1724: return (1);
1725: }
1.73 christos 1726: SLIST_INSERT_HEAD(&sb->sb_sel.sel_klist, kn, kn_selnext);
1.72 jdolecek 1727: sb->sb_flags |= SB_KNOTE;
1728: return (0);
1729: }
1730:
1.94 yamt 1731: #include <sys/sysctl.h>
1732:
1733: static int sysctl_kern_somaxkva(SYSCTLFN_PROTO);
1734:
1735: /*
1736: * sysctl helper routine for kern.somaxkva. ensures that the given
1737: * value is not too small.
1738: * (XXX should we maybe make sure it's not too large as well?)
1739: */
1740: static int
1741: sysctl_kern_somaxkva(SYSCTLFN_ARGS)
1742: {
1743: int error, new_somaxkva;
1744: struct sysctlnode node;
1745: int s;
1746:
1747: new_somaxkva = somaxkva;
1748: node = *rnode;
1749: node.sysctl_data = &new_somaxkva;
1750: error = sysctl_lookup(SYSCTLFN_CALL(&node));
1751: if (error || newp == NULL)
1752: return (error);
1753:
1754: if (new_somaxkva < (16 * 1024 * 1024)) /* sanity */
1755: return (EINVAL);
1756:
1757: s = splvm();
1758: simple_lock(&so_pendfree_slock);
1759: somaxkva = new_somaxkva;
1760: wakeup(&socurkva);
1761: simple_unlock(&so_pendfree_slock);
1762: splx(s);
1763:
1764: return (error);
1765: }
1766:
1767: SYSCTL_SETUP(sysctl_kern_somaxkva_setup, "sysctl kern.somaxkva setup")
1768: {
1769:
1.97 atatat 1770: sysctl_createv(clog, 0, NULL, NULL,
1771: CTLFLAG_PERMANENT,
1772: CTLTYPE_NODE, "kern", NULL,
1773: NULL, 0, NULL, 0,
1774: CTL_KERN, CTL_EOL);
1775:
1776: sysctl_createv(clog, 0, NULL, NULL,
1777: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.94 yamt 1778: CTLTYPE_INT, "somaxkva", NULL,
1779: sysctl_kern_somaxkva, 0, NULL, 0,
1780: CTL_KERN, KERN_SOMAXKVA, CTL_EOL);
1781: }
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