From 3f935c75eb52dd968351dba824adf466fb9c9429 Mon Sep 17 00:00:00 2001 From: Paolo Abeni Date: Thu, 9 Jul 2020 15:12:39 +0200 Subject: inet_diag: support for wider protocol numbers After commit bf9765145b85 ("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: David S. Miller Co-developed-by: Christoph Paasch Signed-off-by: Christoph Paasch Acked-by: Mat Martineau Signed-off-by: Paolo Abeni Signed-off-by: David S. Miller --- net/core/sock.c | 1 + 1 file changed, 1 insertion(+) (limited to 'net/core') diff --git a/net/core/sock.c b/net/core/sock.c index f5b5fdd61c88..de26fe4ea19f 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -3566,6 +3566,7 @@ int sock_load_diag_module(int family, int protocol) #ifdef CONFIG_INET if (family == AF_INET && protocol != IPPROTO_RAW && + protocol < MAX_INET_PROTOS && !rcu_access_pointer(inet_protos[protocol])) return -ENOENT; #endif -- cgit v1.2.3