Date: Tue, 30 Aug 2005 11:50:15 +0200 From: Andre Oppermann <andre@freebsd.org> To: Maxim Konovalov <maxim@macomnet.ru> Cc: cvs-src@FreeBSD.org, src-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/sys mbuf.h src/sys/kern uipc_mbuf.c Message-ID: <43142BD7.F0F6A285@freebsd.org> References: <200508292015.j7TKFYuW094247@repoman.freebsd.org> <43136DEB.B59F9276@freebsd.org> <20050830070415.D48618@mp2.macomnet.net>
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Maxim Konovalov wrote: > > Hi, > > [...] > > > Add m_copymdata(struct mbuf *m, struct mbuf *n, int off, int len, > > > int prep, int how). > > > > > > Copies the data portion of mbuf (chain) n starting from offset off > > > for length len to mbuf (chain) m. Depending on prep the copied > > > data will be appended or prepended. The function ensures that the > > > mbuf (chain) m will be fully writeable by making real (not refcnt) > > > copies of mbuf clusters. For the prepending the function returns > > > a pointer to the new start of mbuf chain m and leaves as much > > > leading space as possible in the new first mbuf. > > > > This one is primarily for the new TCP reassembly which makes very > > efficient use of mbufs. > > Is it feasible to document all these new mbuf functions in mbuf.9? Yes, upcoming. -- Andre
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