[PATCH net-next 07/15] scm: allow AF_BUS sockets to send ancillary data

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From: Javier Martinez Canillas <javier.martinez@xxxxxxxxxxxxxxx>

Similar to UNIX domain sockets AF_BUS sockets support passing file
descriptors and process credentials which requires supporting passing
control messages.

The core socket level control messages processing requires extending
to allow sockets other than PF_UNIX to send SCM_RIGHTS type messages.

Signed-off-by: Javier Martinez Canillas <javier.martinez@xxxxxxxxxxxxxxx>
Signed-off-by: Vincent Sanders <vincent.sanders@xxxxxxxxxxxxxxx>
 net/core/scm.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/core/scm.c b/net/core/scm.c
index 611c5ef..87e3152 100644
--- a/net/core/scm.c
+++ b/net/core/scm.c
@@ -158,7 +158,8 @@ int __scm_send(struct socket *sock, struct msghdr *msg, struct scm_cookie *p)
 		switch (cmsg->cmsg_type)
 		case SCM_RIGHTS:
-			if (!sock->ops || sock->ops->family != PF_UNIX)
+			if (!sock->ops || (sock->ops->family != PF_UNIX &&
+					   sock->ops->family != PF_BUS))
 				goto error;
 			err=scm_fp_copy(cmsg, &p->fp);
 			if (err<0)

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