1/*
2 * Copyright (c) 1982, 1986, 1988, 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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42#include <sys/mbuf.h>
43#include <sys/kernel.h>
44#include <sys/syslog.h>
45#include <sys/domain.h>
46#include <sys/protosw.h>
47
48#include <vm/vm.h>
49
50void m_reclaim __P(());
51
52extern vm_map_t mb_map;
53struct mbuf *mbutl;
54char *mclrefcnt;
55
56void
57mbinit()
58{
59 int s;
60
61#if CLBYTES < 4096
62#define NCL_INIT (4096/CLBYTES)
63#else
64#define NCL_INIT 1

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73}
74
75/*
76 * Allocate some number of mbuf clusters
77 * and place on cluster free list.
78 * Must be called at splimp.
79 */
80/* ARGSUSED */
81int
82m_clalloc(ncl, nowait)
83 register int ncl;
84 int nowait;
85{
86 static int logged;
87 register caddr_t p;
88 register int i;
89 int npg;

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136
137 m_reclaim();
138#define m_retryhdr(i, t) (struct mbuf *)0
139 MGETHDR(m, i, t);
140#undef m_retryhdr
141 return (m);
142}
143
144void
145m_reclaim()
146{
147 register struct domain *dp;
148 register struct protosw *pr;
149 int s = splimp();
150
151 for (dp = domains; dp; dp = dp->dom_next)
152 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)

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323 MCFail++;
324 return (0);
325}
326
327/*
328 * Copy data from an mbuf chain starting "off" bytes from the beginning,
329 * continuing for "len" bytes, into the indicated buffer.
330 */
331void
332m_copydata(m, off, len, cp)
333 register struct mbuf *m;
334 register int off;
335 register int len;
336 caddr_t cp;
337{
338 register unsigned count;
339

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359 }
360}
361
362/*
363 * Concatenate mbuf chain n to m.
364 * Both chains must be of the same type (e.g. MT_DATA).
365 * Any m_pkthdr is not updated.
366 */
367void
368m_cat(m, n)
369 register struct mbuf *m, *n;
370{
371 while (m->m_next)
372 m = m->m_next;
373 while (n) {
374 if (m->m_flags & M_EXT ||
375 m->m_data + m->m_len + n->m_len >= &m->m_dat[MLEN]) {

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380 /* splat the data from one into the other */
381 bcopy(mtod(n, caddr_t), mtod(m, caddr_t) + m->m_len,
382 (u_int)n->m_len);
383 m->m_len += n->m_len;
384 n = m_free(n);
385 }
386}
387
388void
389m_adj(mp, req_len)
390 struct mbuf *mp;
391 int req_len;
392{
393 register int len = req_len;
394 register struct mbuf *m;
395 register count;
396

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