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📄 Make.tags.inc(2.13 KB)
📄 Makefile(302 B)
📄 bus_if.m(26.31 KB)
📄 capabilities.conf(13.67 KB)
📄 clock_if.m(1.7 KB)
📄 cpufreq_if.m(2.27 KB)
📄 device_if.m(10.41 KB)
📄 firmw.S(2.15 KB)
📄 genassym.sh(1.11 KB)
📄 genoffset.c(1.68 KB)
📄 genoffset.sh(3.58 KB)
📄 imgact_aout.c(9.45 KB)
📄 imgact_binmisc.c(18.64 KB)
📄 imgact_elf.c(76.32 KB)
📄 imgact_elf32.c(1.47 KB)
📄 imgact_elf64.c(1.47 KB)
📄 imgact_shell.c(8.41 KB)
📄 init_main.c(24.31 KB)
📄 init_sysent.c(95.3 KB)
📄 kern_acct.c(19.03 KB)
📄 kern_alq.c(24.97 KB)
📄 kern_clock.c(21.12 KB)
📄 kern_clocksource.c(23.34 KB)
📄 kern_condvar.c(11.28 KB)
📄 kern_conf.c(36.14 KB)
📄 kern_cons.c(15.75 KB)
📄 kern_context.c(3.59 KB)
📄 kern_cpu.c(30.77 KB)
📄 kern_cpuset.c(59.78 KB)
📄 kern_ctf.c(8.73 KB)
📄 kern_descrip.c(112.87 KB)
📄 kern_dtrace.c(2.94 KB)
📄 kern_dump.c(8.51 KB)
📄 kern_environment.c(22.75 KB)
📄 kern_et.c(7.1 KB)
📄 kern_event.c(62.49 KB)
📄 kern_exec.c(46.67 KB)
📄 kern_exit.c(34.61 KB)
📄 kern_fail.c(29.32 KB)
📄 kern_ffclock.c(12.66 KB)
📄 kern_fork.c(28.29 KB)
📄 kern_hhook.c(13.58 KB)
📄 kern_idle.c(2.74 KB)
📄 kern_intr.c(40.44 KB)
📄 kern_jail.c(112.67 KB)
📄 kern_kcov.c(15.32 KB)
📄 kern_khelp.c(9.45 KB)
📄 kern_kthread.c(11.8 KB)
📄 kern_ktr.c(11.93 KB)
📄 kern_ktrace.c(31.41 KB)
📄 kern_linker.c(54.3 KB)
📄 kern_lock.c(46.99 KB)
📄 kern_lockf.c(64.46 KB)
📄 kern_lockstat.c(3.8 KB)
📄 kern_loginclass.c(6.69 KB)
📄 kern_malloc.c(37.09 KB)
📄 kern_mbuf.c(43.16 KB)
📄 kern_mib.c(24.26 KB)
📄 kern_module.c(11.05 KB)
📄 kern_mtxpool.c(5.82 KB)
📄 kern_mutex.c(33.62 KB)
📄 kern_ntptime.c(32.49 KB)
📄 kern_osd.c(12.37 KB)
📄 kern_physio.c(5.74 KB)
📄 kern_pmc.c(8.89 KB)
📄 kern_poll.c(15.86 KB)
📄 kern_priv.c(9.14 KB)
📄 kern_proc.c(80.01 KB)
📄 kern_procctl.c(19.48 KB)
📄 kern_prot.c(57.94 KB)
📄 kern_racct.c(34.01 KB)
📄 kern_rangelock.c(8.67 KB)
📄 kern_rctl.c(53.87 KB)
📄 kern_resource.c(36.66 KB)
📄 kern_rmlock.c(28.27 KB)
📄 kern_rwlock.c(40.72 KB)
📄 kern_sdt.c(2.05 KB)
📄 kern_sema.c(4.85 KB)
📄 kern_sendfile.c(33.97 KB)
📄 kern_sharedpage.c(10.37 KB)
📄 kern_shutdown.c(43.34 KB)
📄 kern_sig.c(101.89 KB)
📄 kern_switch.c(13.85 KB)
📄 kern_sx.c(40.27 KB)
📄 kern_synch.c(18.17 KB)
📄 kern_syscalls.c(6.74 KB)
📄 kern_sysctl.c(67.24 KB)
📄 kern_tc.c(55.73 KB)
📄 kern_thr.c(14.14 KB)
📄 kern_thread.c(41.75 KB)
📄 kern_time.c(40.89 KB)
📄 kern_timeout.c(43.08 KB)
📄 kern_tslog.c(3.44 KB)
📄 kern_ubsan.c(50.74 KB)
📄 kern_umtx.c(107.14 KB)
📄 kern_uuid.c(11.68 KB)
📄 kern_xxx.c(10.44 KB)
📄 ksched.c(6.56 KB)
📄 link_elf.c(47.99 KB)
📄 link_elf_obj.c(44.41 KB)
📄 linker_if.m(3.96 KB)
📄 makesyscalls.sh(23.57 KB)
📄 md4c.c(7.89 KB)
📄 md5c.c(9.56 KB)
📄 msi_if.m(2.48 KB)
📄 p1003_1b.c(8.84 KB)
📄 pic_if.m(3.9 KB)
📄 posix4_mib.c(5.59 KB)
📄 sched_4bsd.c(45.03 KB)
📄 sched_ule.c(82.65 KB)
📄 serdev_if.m(3.49 KB)
📄 stack_protector.c(613 B)
📄 subr_acl_nfs4.c(37.42 KB)
📄 subr_acl_posix1e.c(17.71 KB)
📄 subr_atomic64.c(3.97 KB)
📄 subr_autoconf.c(7.7 KB)
📄 subr_blist.c(31.88 KB)
📄 subr_boot.c(5.8 KB)
📄 subr_bufring.c(2.21 KB)
📄 subr_bus.c(145.4 KB)
📄 subr_bus_dma.c(19.67 KB)
📄 subr_busdma_bufalloc.c(5.24 KB)
📄 subr_capability.c(11.93 KB)
📄 subr_clock.c(10.61 KB)
📄 subr_compressor.c(13.11 KB)
📄 subr_counter.c(4.44 KB)
📄 subr_coverage.c(6.17 KB)
📄 subr_csan.c(25.39 KB)
📄 subr_devmap.c(9.8 KB)
📄 subr_devstat.c(16.21 KB)
📄 subr_disk.c(8.54 KB)
📄 subr_dummy_vdso_tc.c(1.7 KB)
📄 subr_early.c(2.26 KB)
📄 subr_epoch.c(25.02 KB)
📄 subr_eventhandler.c(9.17 KB)
📄 subr_fattime.c(9.98 KB)
📄 subr_filter.c(12.2 KB)
📄 subr_firmware.c(13.88 KB)
📄 subr_gtaskqueue.c(20.19 KB)
📄 subr_hash.c(4.8 KB)
📄 subr_hints.c(12.87 KB)
📄 subr_intr.c(40.61 KB)
📄 subr_kdb.c(16.13 KB)
📄 subr_kobj.c(7.1 KB)
📄 subr_lock.c(18.81 KB)
📄 subr_log.c(7.64 KB)
📄 subr_mchain.c(11.06 KB)
📄 subr_module.c(12.98 KB)
📄 subr_msgbuf.c(10.6 KB)
📄 subr_param.c(10.93 KB)
📄 subr_pcpu.c(10.18 KB)
📄 subr_pctrie.c(20.99 KB)
📄 subr_physmem.c(11.52 KB)
📄 subr_pidctrl.c(5.43 KB)
📄 subr_power.c(3.13 KB)
📄 subr_prf.c(27.42 KB)
📄 subr_prng.c(3.36 KB)
📄 subr_prof.c(15.43 KB)
📄 subr_rangeset.c(8.5 KB)
📄 subr_rman.c(27.61 KB)
📄 subr_rtc.c(11.42 KB)
📄 subr_sbuf.c(20.53 KB)
📄 subr_scanf.c(15.59 KB)
📄 subr_sfbuf.c(6.17 KB)
📄 subr_sglist.c(22.83 KB)
📄 subr_sleepqueue.c(39.43 KB)
📄 subr_smp.c(31.62 KB)
📄 subr_smr.c(20.17 KB)
📄 subr_stack.c(6.47 KB)
📄 subr_stats.c(103.01 KB)
📄 subr_syscall.c(7.98 KB)
📄 subr_taskqueue.c(21.1 KB)
📄 subr_terminal.c(15.52 KB)
📄 subr_trap.c(10.87 KB)
📄 subr_turnstile.c(35.58 KB)
📄 subr_uio.c(11.38 KB)
📄 subr_unit.c(22.97 KB)
📄 subr_vmem.c(43.25 KB)
📄 subr_witness.c(84.59 KB)
📄 sys_capability.c(15.06 KB)
📄 sys_eventfd.c(8.42 KB)
📄 sys_generic.c(44.22 KB)
📄 sys_getrandom.c(4.21 KB)
📄 sys_pipe.c(45.14 KB)
📄 sys_procdesc.c(14.57 KB)
📄 sys_process.c(30.73 KB)
📄 sys_socket.c(20.11 KB)
📄 syscalls.c(22.73 KB)
📄 syscalls.master(60.26 KB)
📄 systrace_args.c(178.49 KB)
📄 sysv_ipc.c(6.53 KB)
📄 sysv_msg.c(48.65 KB)
📄 sysv_sem.c(49.85 KB)
📄 sysv_shm.c(43.93 KB)
📄 tty.c(55.14 KB)
📄 tty_compat.c(11.46 KB)
📄 tty_info.c(9.93 KB)
📄 tty_inq.c(12.22 KB)
📄 tty_outq.c(8.74 KB)
📄 tty_pts.c(19.74 KB)
📄 tty_tty.c(2.83 KB)
📄 tty_ttydisc.c(28.6 KB)
📄 uipc_accf.c(8.07 KB)
📄 uipc_debug.c(12.42 KB)
📄 uipc_domain.c(13.13 KB)
📄 uipc_ktls.c(55.7 KB)
📄 uipc_mbuf.c(52.45 KB)
📄 uipc_mbuf2.c(12.64 KB)
📄 uipc_mbufhash.c(4.9 KB)
📄 uipc_mqueue.c(64.64 KB)
📄 uipc_sem.c(25.18 KB)
📄 uipc_shm.c(50.47 KB)
📄 uipc_sockbuf.c(42.9 KB)
📄 uipc_socket.c(110.61 KB)
📄 uipc_syscalls.c(35.94 KB)
📄 uipc_usrreq.c(75.11 KB)
📄 vfs_acl.c(14.5 KB)
📄 vfs_aio.c(76.32 KB)
📄 vfs_bio.c(145.39 KB)
📄 vfs_cache.c(143.09 KB)
📄 vfs_cluster.c(28.36 KB)
📄 vfs_default.c(33.16 KB)
📄 vfs_export.c(14.55 KB)
📄 vfs_extattr.c(17.91 KB)
📄 vfs_hash.c(6 KB)
📄 vfs_init.c(15.86 KB)
📄 vfs_lookup.c(45.48 KB)
📄 vfs_mount.c(62.58 KB)
📄 vfs_mountroot.c(26.23 KB)
📄 vfs_subr.c(167.52 KB)
📄 vfs_syscalls.c(106.86 KB)
📄 vfs_vnops.c(86.28 KB)
📄 vnode_if.src(13.66 KB)

Editing: subr_mchain.c

/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright (c) 2000, 2001 Boris Popov
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the author nor the names of any co-contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/sysctl.h>
#include <sys/endian.h>
#include <sys/errno.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/module.h>
#include <sys/uio.h>

#include <sys/mchain.h>

FEATURE(libmchain, "mchain library");

MODULE_VERSION(libmchain, 1);

#define MBERROR(format, ...) printf("%s(%d): "format, __func__ , \
				    __LINE__ , ## __VA_ARGS__)

#define MBPANIC(format, ...) printf("%s(%d): "format, __func__ , \
				    __LINE__ , ## __VA_ARGS__)

/*
 * Various helper functions
 */
int
mb_init(struct mbchain *mbp)
{
	struct mbuf *m;

m = m_gethdr(M_WAITOK, MT_DATA);
	m->m_len = 0;
	mb_initm(mbp, m);
	return (0);
}

void
mb_initm(struct mbchain *mbp, struct mbuf *m)
{
	bzero(mbp, sizeof(*mbp));
	mbp->mb_top = mbp->mb_cur = m;
	mbp->mb_mleft = M_TRAILINGSPACE(m);
}

void
mb_done(struct mbchain *mbp)
{
	if (mbp->mb_top) {
		m_freem(mbp->mb_top);
		mbp->mb_top = NULL;
	}
}

struct mbuf *
mb_detach(struct mbchain *mbp)
{
	struct mbuf *m;

m = mbp->mb_top;
	mbp->mb_top = NULL;
	return (m);
}

int
mb_fixhdr(struct mbchain *mbp)
{
	return (mbp->mb_top->m_pkthdr.len = m_fixhdr(mbp->mb_top));
}

/*
 * Check if object of size 'size' fit to the current position and
 * allocate new mbuf if not. Advance pointers and increase length of mbuf(s).
 * Return pointer to the object placeholder or NULL if any error occurred.
 * Note: size should be <= MLEN 
 */
caddr_t
mb_reserve(struct mbchain *mbp, int size)
{
	struct mbuf *m, *mn;
	caddr_t bpos;

if (size > MLEN)
		panic("mb_reserve: size = %d\n", size);
	m = mbp->mb_cur;
	if (mbp->mb_mleft < size) {
		mn = m_get(M_WAITOK, MT_DATA);
		mbp->mb_cur = m->m_next = mn;
		m = mn;
		m->m_len = 0;
		mbp->mb_mleft = M_TRAILINGSPACE(m);
	}
	mbp->mb_mleft -= size;
	mbp->mb_count += size;
	bpos = mtod(m, caddr_t) + m->m_len;
	m->m_len += size;
	return (bpos);
}

int
mb_put_padbyte(struct mbchain *mbp)
{
	caddr_t dst;
	uint8_t x = 0;

dst = mtod(mbp->mb_cur, caddr_t) + mbp->mb_cur->m_len;

/* Only add padding if address is odd */
	if ((unsigned long)dst & 1)
		return (mb_put_mem(mbp, (caddr_t)&x, sizeof(x), MB_MSYSTEM));
	else
		return (0);
}

int
mb_put_uint8(struct mbchain *mbp, uint8_t x)
{
	return (mb_put_mem(mbp, (caddr_t)&x, sizeof(x), MB_MSYSTEM));
}

int
mb_put_uint16be(struct mbchain *mbp, uint16_t x)
{
	x = htobe16(x);
	return (mb_put_mem(mbp, (caddr_t)&x, sizeof(x), MB_MSYSTEM));
}

int
mb_put_uint16le(struct mbchain *mbp, uint16_t x)
{
	x = htole16(x);
	return (mb_put_mem(mbp, (caddr_t)&x, sizeof(x), MB_MSYSTEM));
}

int
mb_put_uint32be(struct mbchain *mbp, uint32_t x)
{
	x = htobe32(x);
	return (mb_put_mem(mbp, (caddr_t)&x, sizeof(x), MB_MSYSTEM));
}

int
mb_put_uint32le(struct mbchain *mbp, uint32_t x)
{
	x = htole32(x);
	return (mb_put_mem(mbp, (caddr_t)&x, sizeof(x), MB_MSYSTEM));
}

int
mb_put_int64be(struct mbchain *mbp, int64_t x)
{
	x = htobe64(x);
	return (mb_put_mem(mbp, (caddr_t)&x, sizeof(x), MB_MSYSTEM));
}

int
mb_put_int64le(struct mbchain *mbp, int64_t x)
{
	x = htole64(x);
	return (mb_put_mem(mbp, (caddr_t)&x, sizeof(x), MB_MSYSTEM));
}

int
mb_put_mem(struct mbchain *mbp, c_caddr_t source, int size, int type)
{
	struct mbuf *m;
	caddr_t dst;
	c_caddr_t src;
	int cplen, error, mleft, count;
	size_t srclen, dstlen;

m = mbp->mb_cur;
	mleft = mbp->mb_mleft;

while (size > 0) {
		if (mleft == 0) {
			if (m->m_next == NULL)
				m = m_getm(m, size, M_WAITOK, MT_DATA);
			else
				m = m->m_next;
			mleft = M_TRAILINGSPACE(m);
			continue;
		}
		cplen = mleft > size ? size : mleft;
		srclen = dstlen = cplen;
		dst = mtod(m, caddr_t) + m->m_len;
		switch (type) {
		    case MB_MCUSTOM:
			srclen = size;
			dstlen = mleft;
			error = mbp->mb_copy(mbp, source, dst, &srclen, &dstlen);
			if (error)
				return (error);
			break;
		    case MB_MINLINE:
			for (src = source, count = cplen; count; count--)
				*dst++ = *src++;
			break;
		    case MB_MSYSTEM:
			bcopy(source, dst, cplen);
			break;
		    case MB_MUSER:
			error = copyin(source, dst, cplen);
			if (error)
				return (error);
			break;
		    case MB_MZERO:
			bzero(dst, cplen);
			break;
		}
		size -= srclen;
		source += srclen;
		m->m_len += dstlen;
		mleft -= dstlen;
		mbp->mb_count += dstlen;
	}
	mbp->mb_cur = m;
	mbp->mb_mleft = mleft;
	return (0);
}

int
mb_put_mbuf(struct mbchain *mbp, struct mbuf *m)
{
	mbp->mb_cur->m_next = m;
	while (m) {
		mbp->mb_count += m->m_len;
		if (m->m_next == NULL)
			break;
		m = m->m_next;
	}
	mbp->mb_mleft = M_TRAILINGSPACE(m);
	mbp->mb_cur = m;
	return (0);
}

/*
 * copies a uio scatter/gather list to an mbuf chain.
 */
int
mb_put_uio(struct mbchain *mbp, struct uio *uiop, int size)
{
	long left;
	int mtype, error;

mtype = (uiop->uio_segflg == UIO_SYSSPACE) ? MB_MSYSTEM : MB_MUSER;

while (size > 0 && uiop->uio_resid) {
		if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL)
			return (EFBIG);
		left = uiop->uio_iov->iov_len;
		if (left == 0) {
			uiop->uio_iov++;
			uiop->uio_iovcnt--;
			continue;
		}
		if (left > size)
			left = size;
		error = mb_put_mem(mbp, uiop->uio_iov->iov_base, left, mtype);
		if (error)
			return (error);
		uiop->uio_offset += left;
		uiop->uio_resid -= left;
		uiop->uio_iov->iov_base =
		    (char *)uiop->uio_iov->iov_base + left;
		uiop->uio_iov->iov_len -= left;
		size -= left;
	}
	return (0);
}

/*
 * Routines for fetching data from an mbuf chain
 */
int
md_init(struct mdchain *mdp)
{
	struct mbuf *m;

m = m_gethdr(M_WAITOK, MT_DATA);
	m->m_len = 0;
	md_initm(mdp, m);
	return (0);
}

void
md_initm(struct mdchain *mdp, struct mbuf *m)
{
	bzero(mdp, sizeof(*mdp));
	mdp->md_top = mdp->md_cur = m;
	mdp->md_pos = mtod(m, u_char*);
}

void
md_done(struct mdchain *mdp)
{
	if (mdp->md_top) {
		m_freem(mdp->md_top);
		mdp->md_top = NULL;
	}
}

/*
 * Append a separate mbuf chain. It is caller responsibility to prevent
 * multiple calls to fetch/record routines.
 */
void
md_append_record(struct mdchain *mdp, struct mbuf *top)
{
	struct mbuf *m;

if (mdp->md_top == NULL) {
		md_initm(mdp, top);
		return;
	}
	m = mdp->md_top;
	while (m->m_nextpkt)
		m = m->m_nextpkt;
	m->m_nextpkt = top;
	top->m_nextpkt = NULL;
	return;
}

/*
 * Put next record in place of existing
 */
int
md_next_record(struct mdchain *mdp)
{
	struct mbuf *m;

if (mdp->md_top == NULL)
		return (ENOENT);
	m = mdp->md_top->m_nextpkt;
	md_done(mdp);
	if (m == NULL)
		return (ENOENT);
	md_initm(mdp, m);
	return (0);
}

int
md_get_uint8(struct mdchain *mdp, uint8_t *x)
{
	return (md_get_mem(mdp, x, 1, MB_MINLINE));
}

int
md_get_uint16(struct mdchain *mdp, uint16_t *x)
{
	return (md_get_mem(mdp, (caddr_t)x, 2, MB_MINLINE));
}

int
md_get_uint16le(struct mdchain *mdp, uint16_t *x)
{
	uint16_t v;
	int error = md_get_uint16(mdp, &v);

if (x != NULL)
		*x = le16toh(v);
	return (error);
}

int
md_get_uint16be(struct mdchain *mdp, uint16_t *x)
{
	uint16_t v;
	int error = md_get_uint16(mdp, &v);

if (x != NULL)
		*x = be16toh(v);
	return (error);
}

int
md_get_uint32(struct mdchain *mdp, uint32_t *x)
{
	return (md_get_mem(mdp, (caddr_t)x, 4, MB_MINLINE));
}

int
md_get_uint32be(struct mdchain *mdp, uint32_t *x)
{
	uint32_t v;
	int error;

error = md_get_uint32(mdp, &v);
	if (x != NULL)
		*x = be32toh(v);
	return (error);
}

int
md_get_uint32le(struct mdchain *mdp, uint32_t *x)
{
	uint32_t v;
	int error;

error = md_get_uint32(mdp, &v);
	if (x != NULL)
		*x = le32toh(v);
	return (error);
}

int
md_get_int64(struct mdchain *mdp, int64_t *x)
{
	return (md_get_mem(mdp, (caddr_t)x, 8, MB_MINLINE));
}

int
md_get_int64be(struct mdchain *mdp, int64_t *x)
{
	int64_t v;
	int error;

error = md_get_int64(mdp, &v);
	if (x != NULL)
		*x = be64toh(v);
	return (error);
}

int
md_get_int64le(struct mdchain *mdp, int64_t *x)
{
	int64_t v;
	int error;

error = md_get_int64(mdp, &v);
	if (x != NULL)
		*x = le64toh(v);
	return (error);
}

int
md_get_mem(struct mdchain *mdp, caddr_t target, int size, int type)
{
	struct mbuf *m = mdp->md_cur;
	int error;
	u_int count;
	u_char *s;

while (size > 0) {
		if (m == NULL) {
			MBERROR("incomplete copy\n");
			return (EBADRPC);
		}
		s = mdp->md_pos;
		count = mtod(m, u_char*) + m->m_len - s;
		if (count == 0) {
			mdp->md_cur = m = m->m_next;
			if (m)
				s = mdp->md_pos = mtod(m, caddr_t);
			continue;
		}
		if (count > size)
			count = size;
		size -= count;
		mdp->md_pos += count;
		if (target == NULL)
			continue;
		switch (type) {
		    case MB_MUSER:
			error = copyout(s, target, count);
			if (error)
				return error;
			break;
		    case MB_MSYSTEM:
			bcopy(s, target, count);
			break;
		    case MB_MINLINE:
			while (count--)
				*target++ = *s++;
			continue;
		}
		target += count;
	}
	return (0);
}

int
md_get_mbuf(struct mdchain *mdp, int size, struct mbuf **ret)
{
	struct mbuf *m = mdp->md_cur, *rm;

rm = m_copym(m, mdp->md_pos - mtod(m, u_char*), size, M_WAITOK);
	md_get_mem(mdp, NULL, size, MB_MZERO);
	*ret = rm;
	return (0);
}

int
md_get_uio(struct mdchain *mdp, struct uio *uiop, int size)
{
	char *uiocp;
	long left;
	int mtype, error;

mtype = (uiop->uio_segflg == UIO_SYSSPACE) ? MB_MSYSTEM : MB_MUSER;
	while (size > 0 && uiop->uio_resid) {
		if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL)
			return (EFBIG);
		left = uiop->uio_iov->iov_len;
		if (left == 0) {
			uiop->uio_iov++;
			uiop->uio_iovcnt--;
			continue;
		}
		uiocp = uiop->uio_iov->iov_base;
		if (left > size)
			left = size;
		error = md_get_mem(mdp, uiocp, left, mtype);
		if (error)
			return (error);
		uiop->uio_offset += left;
		uiop->uio_resid -= left;
		uiop->uio_iov->iov_base =
		    (char *)uiop->uio_iov->iov_base + left;
		uiop->uio_iov->iov_len -= left;
		size -= left;
	}
	return (0);
}

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