[PATCH net-next 1/3] rtnetlink: add NEWCACHEREPORT message type

[Julien Gomes]

New NEWCACHEREPORT message type to be used for cache reports sent
via Netlink, effectively allowing splitting cache report reception from
mroute programming.

Suggested-by: Ryan Halbrook <halbr...@arista.com>
Signed-off-by: Julien Gomes <jul...@arista.com>
---
 include/uapi/linux/rtnetlink.h | 3 +++
 security/selinux/nlmsgtab.c    | 3 ++-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/include/uapi/linux/rtnetlink.h b/include/uapi/linux/rtnetlink.h
index 564790e854f7..cd1afb900929 100644
--- a/include/uapi/linux/rtnetlink.h
+++ b/include/uapi/linux/rtnetlink.h
@@ -146,6 +146,9 @@ enum {
        RTM_GETSTATS = 94,
 #define RTM_GETSTATS RTM_GETSTATS
 
+       RTM_NEWCACHEREPORT = 96,
+#define RTM_NEWCACHEREPORT RTM_NEWCACHEREPORT
+
        __RTM_MAX,
 #define RTM_MAX                (((__RTM_MAX + 3) & ~3) - 1)
 };
diff --git a/security/selinux/nlmsgtab.c b/security/selinux/nlmsgtab.c
index 5aeaf30b7a13..7b7433a1a34c 100644
--- a/security/selinux/nlmsgtab.c
+++ b/security/selinux/nlmsgtab.c
@@ -79,6 +79,7 @@ static const struct nlmsg_perm nlmsg_route_perms[] =
        { RTM_GETNSID,          NETLINK_ROUTE_SOCKET__NLMSG_READ  },
        { RTM_NEWSTATS,         NETLINK_ROUTE_SOCKET__NLMSG_READ },
        { RTM_GETSTATS,         NETLINK_ROUTE_SOCKET__NLMSG_READ  },
+       { RTM_NEWCACHEREPORT,   NETLINK_ROUTE_SOCKET__NLMSG_READ },
 };
 
 static const struct nlmsg_perm nlmsg_tcpdiag_perms[] =
@@ -158,7 +159,7 @@ int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 
*perm)
        switch (sclass) {
        case SECCLASS_NETLINK_ROUTE_SOCKET:
                /* RTM_MAX always point to RTM_SETxxxx, ie RTM_NEWxxx + 3 */
-               BUILD_BUG_ON(RTM_MAX != (RTM_NEWSTATS + 3));
+               BUILD_BUG_ON(RTM_MAX != (RTM_NEWCACHEREPORT + 3));
                err = nlmsg_perm(nlmsg_type, perm, nlmsg_route_perms,
                                 sizeof(nlmsg_route_perms));
                break;
-- 
2.13.1