Author: mav
Date: Sun Jan 18 20:19:55 2009
New Revision: 187409
URL: http://svn.freebsd.org/changeset/base/187409
Log:
Teach m_copyback() to use trailing space of the last mbuf in chain.
Modified:
head/sys/kern/uipc_mbuf.c
Modified: head/sys/kern/uipc_mbuf.c
==============================================================================
--- head/sys/kern/uipc_mbuf.c Sun Jan 18 19:56:13 2009 (r187408)
+++ head/sys/kern/uipc_mbuf.c Sun Jan 18 20:19:55 2009 (r187409)
@@ -1271,6 +1271,10 @@ m_copyback(struct mbuf *m0, int off, int
m = m->m_next;
}
while (len > 0) {
+ if (m->m_next == NULL && (len > m->m_len - off)) {
+ m->m_len += min(len - (m->m_len - off),
+ M_TRAILINGSPACE(m));
+ }
mlen = min (m->m_len - off, len);
bcopy(cp, off + mtod(m, caddr_t), (u_int)mlen);
cp += mlen;
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