cvs commit: src/sys/sys mbuf.h src/sys/kern uipc_mbuf.c

[Andre Oppermann]

andre       2005-08-29 20:15:33 UTC

  FreeBSD src repository

  Modified files:
    sys/sys              mbuf.h 
    sys/kern             uipc_mbuf.c 
  Log:
  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.
  
  Reviewed by:    glebius
  
  Revision  Changes    Path
  1.152     +145 -0    src/sys/kern/uipc_mbuf.c
  1.175     +2 -0      src/sys/sys/mbuf.h