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    [PATCH] knfsd: be more selective in which sockets lockd listens on · 24e36663
    NeilBrown 提交于
    Currently lockd listens on UDP always, and TCP if CONFIG_NFSD_TCP is set.
    
    However as lockd performs services of the client as well, this is a problem.
    If CONFIG_NfSD_TCP is not set, and a tcp mount is used, the server will not be
    able to call back to lockd.
    
    So:
     - add an option to lockd_up saying which protocol is needed
     - Always open sockets for which an explicit port was given, otherwise
       only open a socket of the type required
     - Change nfsd to do one lockd_up per socket rather than one per thread.
    
    This
     - removes the dependancy on CONFIG_NFSD_TCP
     - means that lockd may open sockets other than at startup
     - means that lockd will *not* listen on UDP if the only
       mounts are TCP mount (and nfsd hasn't started).
    
    The latter is the only one that concerns me at all - I don't know if this
    might be a problem with some servers.
    Signed-off-by: NNeil Brown <neilb@suse.de>
    Signed-off-by: NAndrew Morton <akpm@osdl.org>
    Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
    24e36663
client.c 34.6 KB