• Eric W. Biederman's avatar
    [NET]: Make the device list and device lookups per namespace. · 881d966b
    Eric W. Biederman authored
    This patch makes most of the generic device layer network
    namespace safe.  This patch makes dev_base_head a
    network namespace variable, and then it picks up
    a few associated variables.  The functions:
    dev_getbyhwaddr
    dev_getfirsthwbytype
    dev_get_by_flags
    dev_get_by_name
    __dev_get_by_name
    dev_get_by_index
    __dev_get_by_index
    dev_ioctl
    dev_ethtool
    dev_load
    wireless_process_ioctl
    
    were modified to take a network namespace argument, and
    deal with it.
    
    vlan_ioctl_set and brioctl_set were modified so their
    hooks will receive a network namespace argument.
    
    So basically anthing in the core of the network stack that was
    affected to by the change of dev_base was modified to handle
    multiple network namespaces.  The rest of the network stack was
    simply modified to explicitly use &init_net the initial network
    namespace.  This can be fixed when those components of the network
    stack are modified to handle multiple network namespaces.
    
    For now the ifindex generator is left global.
    
    Fundametally ifindex numbers are per namespace, or else
    we will have corner case problems with migration when
    we get that far.
    
    At the same time there are assumptions in the network stack
    that the ifindex of a network device won't change.  Making
    the ifindex number global seems a good compromise until
    the network stack can cope with ifindex changes when
    you change namespaces, and the like.
    Signed-off-by: default avatarEric W. Biederman <ebiederm@xmission.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    881d966b
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