cvs commit: src/sys/conf majors src/sys/dev/nmdm nmdm.c src/sys/dev/snp snp.c src/sys/kern kern_conf.c src/sys/net if_tap.c if_tapvar.h if_tun.c if_tunvar.h src/sys/sys conf.h

[Poul-Henning Kamp]

phk         2004/02/21 12:29:53 PST

  FreeBSD src repository

  Modified files:
    sys/conf             majors 
    sys/dev/nmdm         nmdm.c 
    sys/dev/snp          snp.c 
    sys/kern             kern_conf.c 
    sys/net              if_tap.c if_tapvar.h if_tun.c 
    sys/sys              conf.h 
  Removed files:
    sys/net              if_tunvar.h 
  Log:
  Device megapatch 2/6:
  
  This commit adds a couple of functions for pseudodrivers to use for
  implementing cloning in a manner we will be able to lock down (shortly).
  
  Basically what happens is that pseudo drivers get a way to ask for
  "give me the dev_t with this unit number" or alternatively "give
  me a dev_t with the lowest guaranteed free unit number" (there is
  unfortunately a lot of non-POLA in the exact numeric value of this
  number, just live with it for now)
  
  Managing the unit number space this way removes the need to use
  rman(9) to do so in the drivers this greatly simplifies the code in
  the drivers because even using rman(9) they still needed to manage
  their dev_t's anyway.
  
  I have taken the if_tun, if_tap, snp and nmdm drivers through the
  mill, partly because they (ab)used makedev(), but mostly because
  together they represent three different problems for device-cloning:
  
  if_tun and snp is the plain case: just give me a device.
  
  if_tap has two kinds of devices, with a flag for device type.
  
  nmdm has paired devices (ala pty) can you can clone either of them.
  
  Revision  Changes    Path
  1.195     +0 -3      src/sys/conf/majors
  1.18      +85 -84    src/sys/dev/nmdm/nmdm.c
  1.83      +12 -18    src/sys/dev/snp/snp.c
  1.142     +129 -8    src/sys/kern/kern_conf.c
  1.34      +35 -129   src/sys/net/if_tap.c
  1.5       +2 -1      src/sys/net/if_tapvar.h
  1.132     +61 -100   src/sys/net/if_tun.c
  1.11      +0 -55     src/sys/net/if_tunvar.h (dead)
  1.180     +9 -0      src/sys/sys/conf.h