From owner-cvs-all  Tue Feb 13 21:13: 9 2001
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From: Bosko Milekic <bmilekic@FreeBSD.org>
Date: Tue, 13 Feb 2001 21:13:05 -0800 (PST)
To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: cvs commit: src/sys/kern uipc_mbuf.c src/sys/netncp ncp_rq.c
         src/sys/sys mbuf.h
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bmilekic    2001/02/13 21:13:05 PST

  Modified files:
    sys/kern             uipc_mbuf.c 
    sys/netncp           ncp_rq.c 
    sys/sys              mbuf.h 
  Log:
  Implement m_getm() which will perform an "all or nothing" mbuf + cluster
  allocation, as required.
  
  If m_getm() receives NULL as a first argument, then it allocates `len'
  (second argument) bytes worth of mbufs + clusters and returns the chain
  only if it was able to allocate everything.
  If the first argument is non-NULL, then it should be an existing mbuf
  chain (e.g. pre-allocated mbuf sitting on a ring, on some list, etc.) and
  so it will allocate `len' bytes worth of clusters and mbufs, as needed,
  and append them to the tail of the passed in chain, only if it was able
  to allocate everything requested.
  
  If allocation fails, only what was allocated by the routine will be freed,
  and NULL will be returned.
  
  Also, get rid of existing m_getm() in netncp code and replace calls to it
  to calls to this new generic code.
  
  Heavily Reviewed by: bp
  
  Revision  Changes    Path
  1.67      +68 -2     src/sys/kern/uipc_mbuf.c
  1.3       +3 -28     src/sys/netncp/ncp_rq.c
  1.70      +2 -1      src/sys/sys/mbuf.h



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