sendfile in FreeBSD 2.2

[Julian Elischer]

> Hello. Would it be possible to port the sendfile system call to a FreeBSD 2.2 based system? Has anyone done this? I am trying to port the code from a later FreeBSD release and I have been unable to find out what the VOP_GETVOBJECT() macro does and how/what should it be replaced with for my case. Any help is appreciated.
> 
> Thanks
> vijay
> 

It's not impossible that you could do it.
sendfile was introduced just after 3.0 and quite a bit before 3.1

I don't know however how much vm hacking was required to get it to
work..


here is the actual commit message..
this will tell you what was changed.. and at what revision..

What are the chances Nokia would move to a newer version? :-)

good luck

dg          1998/11/05 06:28:27 PST

  Modified files:
    sys/conf             options param.c 
    sys/kern             init_sysent.c syscalls.c syscalls.master 
                         uipc_syscalls.c 
    sys/sys              mbuf.h socket.h socketvar.h 
                         syscall-hide.h syscall.h syscall.mk 
                         sysproto.h 
    sys/vm               vm_object.c 
  Log:
  Implemented zero-copy TCP/IP extensions via sendfile(2) - send a
  file to a stream socket. sendfile(2) is similar to implementations in
  HP-UX, Linux, and other systems, but the API is more extensive and
  addresses many of the complaints that the Apache Group and others have
  had with those other implementations. Thanks to Marc Slemko of the
  Apache Group for helping me work out the best API for this.
  Anyway, this has the "net" result of speeding up sends of files over
  TCP/IP sockets by about 10X (that is to say, uses 1/10th of the CPU
  cycles) when compared to a traditional read/write loop.
  
  Revision  Changes    Path
  1.107     +2 -1      src/sys/conf/options
  1.31      +7 -1      src/sys/conf/param.c
  1.61      +1 -0      src/sys/kern/init_sysent.c
  1.54      +1 -0      src/sys/kern/syscalls.c
  1.54      +3 -1      src/sys/kern/syscalls.master
  1.42      +403 -1    src/sys/kern/uipc_syscalls.c
  1.30      +2 -1      src/sys/sys/mbuf.h
  1.27      +12 -1     src/sys/sys/socket.h
  1.30      +8 -1      src/sys/sys/socketvar.h
  1.48      +1 -0      src/sys/sys/syscall-hide.h
  1.52      +2 -1      src/sys/sys/syscall.h
  1.7       +2 -1      src/sys/sys/syscall.mk
  1.42      +10 -0     src/sys/sys/sysproto.h
  1.135     +1 -3      src/sys/vm/vm_object.c


dg          1998/11/05 06:36:38 PST

  Modified files:
    sys/i386/conf        LINT 
  Log:
  Document the new NSFBUFS option.
  
  Revision  Changes    Path
  1.498     +8 -1      src/sys/i386/conf/LINT




On Wed, 21 May 2003 Vijay.Singh at nokia.com wrote: