From 1092cb219774a82b1f16781aec7b8d4ec727c981 Mon Sep 17 00:00:00 2001 From: Patrick McHardy Date: Mon, 25 Jun 2007 13:49:35 -0700 Subject: [NETLINK]: attr: add nested compat attribute type Add a nested compat attribute type that can be used to convert attributes that contain a structure to nested attributes in a backwards compatible way. Signed-off-by: Patrick McHardy Signed-off-by: David S. Miller --- net/netlink/attr.c | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'net/netlink') diff --git a/net/netlink/attr.c b/net/netlink/attr.c index c591212793ee..e4d7bed99c2e 100644 --- a/net/netlink/attr.c +++ b/net/netlink/attr.c @@ -72,6 +72,17 @@ static int validate_nla(struct nlattr *nla, int maxtype, return -ERANGE; break; + case NLA_NESTED_COMPAT: + if (attrlen < pt->len) + return -ERANGE; + if (attrlen < NLA_ALIGN(pt->len)) + break; + if (attrlen < NLA_ALIGN(pt->len) + NLA_HDRLEN) + return -ERANGE; + nla = nla_data(nla) + NLA_ALIGN(pt->len); + if (attrlen < NLA_ALIGN(pt->len) + NLA_HDRLEN + nla_len(nla)) + return -ERANGE; + break; default: if (pt->len) minlen = pt->len; -- cgit v1.2.1