• Taehee Yoo's avatar
    net: bpfilter: restart bpfilter_umh when error occurred · 61fbf593
    Taehee Yoo authored
    The bpfilter_umh will be stopped via __stop_umh() when the bpfilter
    error occurred.
    The bpfilter_umh() couldn't start again because there is no restart
    routine.
    
    The section of the bpfilter_umh_{start/end} is no longer .init.rodata
    because these area should be reused in the restart routine. hence
    the section name is changed to .bpfilter_umh.
    
    The bpfilter_ops->start() is restart callback. it will be called when
    bpfilter_umh is stopped.
    The stop bit means bpfilter_umh is stopped. this bit is set by both
    start and stop routine.
    
    Before this patch,
    Test commands:
       $ iptables -vnL
       $ kill -9 <pid of bpfilter_umh>
       $ iptables -vnL
       [  480.045136] bpfilter: write fail -32
       $ iptables -vnL
    
    All iptables commands will fail.
    
    After this patch,
    Test commands:
       $ iptables -vnL
       $ kill -9 <pid of bpfilter_umh>
       $ iptables -vnL
       $ iptables -vnL
    
    Now, all iptables commands will work.
    
    Fixes: d2ba09c1
    
     ("net: add skeleton of bpfilter kernel module")
    Signed-off-by: default avatarTaehee Yoo <ap420073@gmail.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    61fbf593
sockopt.c 1.53 KB