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    SubjectNFS problem (2.4.0-test5-pre4)
    From
    >>>>> " " == Tigran Aivazian <tigran@veritas.com> writes:

    > Hi guys, I just spotted an interesting problem.

    > a) I run NFSv3 mountd (i.e. I don't specify --no-nfs-version 3)

    > b) v3 support compiled in the kernel (both client and server)

    > c) pass "tcp" option to select TCP protocol instead of UDP.

    > mount -t nfs -o tcp localhost:/test /mnt

    > this hangs. Also, if I try to pass -o nfsvers=3 on a v2-only
    > kernel it hangs too (inside mount(2) system call)

    > Also, I thought that in v3 it should select tcp protocol by
    > default but it selects udp.

    Hi,

    The tcp server code is still being developed: I code which works well,
    but it's very vulnerable to DOS attacks.

    For the moment therefore, knfsd is UDP-only, and the linux client code
    defaults to UDP...

    Cheers,
    Trond

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