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Commit 3f935c75 authored by Paolo Abeni's avatar Paolo Abeni Committed by David S. Miller
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inet_diag: support for wider protocol numbers



After commit bf976514 ("sock: Make sk_protocol a 16-bit value")
the current size of 'sdiag_protocol' is not sufficient to represent
the possible protocol values.

This change introduces a new inet diag request attribute to let
user space specify the relevant protocol number using u32 values.

The attribute is parsed by inet diag core on get/dump command
and the extended protocol value, if available, is preferred to
'sdiag_protocol' to lookup the diag handler.

The parse attributed are exposed to all the diag handlers via
the cb->data.

Note that inet_diag_dump_one_icsk() is left unmodified, as it
will not be used by protocol using the extended attribute.

Suggested-by: default avatarDavid S. Miller <davem@davemloft.net>
Co-developed-by: default avatarChristoph Paasch <cpaasch@apple.com>
Signed-off-by: default avatarChristoph Paasch <cpaasch@apple.com>
Acked-by: default avatarMat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: default avatarPaolo Abeni <pabeni@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 5ca670e5
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