• Andrey Vagin's avatar
    netlink: Diag core and basic socket info dumping (v2) · eaaa3139
    Andrey Vagin authored
    The netlink_diag can be built as a module, just like it's done in
    unix sockets.
    
    The core dumping message carries the basic info about netlink sockets:
    family, type and protocol, portis, dst_group, dst_portid, state.
    
    Groups can be received as an optional parameter NETLINK_DIAG_GROUPS.
    
    Netlink sockets cab be filtered by protocols.
    
    The socket inode number and cookie is reserved for future per-socket info
    retrieving. The per-protocol filtering is also reserved for future by
    requiring the sdiag_protocol to be zero.
    
    The file /proc/net/netlink doesn't provide enough information for
    dumping netlink sockets. It doesn't provide dst_group, dst_portid,
    groups above 32.
    
    v2: fix NETLINK_DIAG_MAX. Now it's equal to the last constant.
    Acked-by: default avatarPavel Emelyanov <xemul@parallels.com>
    Cc: "David S. Miller" <davem@davemloft.net>
    Cc: Eric Dumazet <edumazet@google.com>
    Cc: Pablo Neira Ayuso <pablo@netfilter.org>
    Cc: "Eric W. Biederman" <ebiederm@xmission.com>
    Cc: Gao feng <gaofeng@cn.fujitsu.com>
    Cc: Thomas Graf <tgraf@suug.ch>
    Signed-off-by: default avatarAndrey Vagin <avagin@openvz.org>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    eaaa3139
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