• Stefan Hajnoczi's avatar
    VSOCK: add sock_diag interface · 413a4317
    Stefan Hajnoczi authored
    This patch adds the sock_diag interface for querying sockets from
    userspace.  Tools like ss(8) and netstat(8) can use this interface to
    list open sockets.
    
    The userspace ABI is defined in <linux/vm_sockets_diag.h> and includes
    netlink request and response structs.  The request can query sockets
    based on their sk_state (e.g. listening sockets only) and the response
    contains socket information fields including the local/remote addresses,
    inode number, etc.
    
    This patch does not dump VMCI pending sockets because I have only tested
    the virtio transport, which does not use pending sockets.  Support can
    be added later by extending vsock_diag_dump() if needed by VMCI users.
    Signed-off-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    413a4317
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