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    SubjectRe: nfs compatibility bug between linux and other os'es
    Andreas Brodmann <> writes:

    > We encountered the following bug when nfs mounting directories
    > from Solaris Servers, AIX Servers and Network Appliance Filers:
    > the mkfifo command (and the C statement itself as well) fail to
    > create real fifos. Instead they create "normal" files. If we create
    > a fifo on a NetApp Filer coming from a Solaris machine the linux
    > box will show it as a character device mith major/minor 255/255.
    > We've tested it thorough all kernels from 2.0.18 to 2.2.10. We're
    > using i386 architecture for our linux servers. Can anyone help us
    > here (bugfixes?).
    > Our goal is to create Linux servers rootmounted on the
    > NetApp filer.
    > P.S.: Using a linux box instead of a NetApp filer as nfs server
    > is no solution for us.
    > Thanks for your help in advance and please excuse me if i'm
    > off topic here. I just didn't know where else to place this
    > report.

    Alan Cox's 'ac' patches contain Ion Badulescu's fix for this problem.

    The problem essentially boils down to the NFSv2 protocol not really
    supporting a 'mkfifo' command (it only appears in NFSv3). One then has
    a choice between two common hacks for supporting mkfifo on UNIX
    systems. Unfortunately, most servers only support the 'other' hack...


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