Date: Wed, 1 Dec 1999 14:31:32 -0800 (PST) From: Archie Cobbs <archie@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/kern uipc_mbuf.c src/sys/sys mbuf.h Message-ID: <199912012231.OAA35086@freefall.freebsd.org>
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archie 1999/12/01 14:31:32 PST
Modified files:
sys/kern uipc_mbuf.c
sys/sys mbuf.h
Log:
The functions m_copym() and m_copypacket() return read-only copies,
because in the case of mbuf clusters they only increment the reference
count rather than actually copying the data.
Add comments to this effect, and add a new routine called m_dup() that
returns a real, writable copy of an mbuf chain.
This is preliminary work required for implementing 'ipfw tee'.
Reviewed by: julian
Revision Changes Path
1.46 +79 -1 src/sys/kern/uipc_mbuf.c
1.37 +2 -1 src/sys/sys/mbuf.h
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