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can: fix ioctl function removal

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Commit 60649d4e0a ("can: remove obsolete empty ioctl() handler") replaced the
almost empty can_ioctl() function with sock_no_ioctl() which always returns
-EOPNOTSUPP.

Even though we don't have any ioctl() functions on socket/network layer we need
to return -ENOIOCTLCMD to be able to forward ioctl commands like SIOCGIFINDEX
to the network driver layer.

This patch fixes the wrong return codes in the CAN network layer protocols.

Reported-by: kernel test robot <rong.a.chen@intel.com>
Fixes: 60649d4e0a ("can: remove obsolete empty ioctl() handler")
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Oliver Hartkopp 2019-07-29 22:40:56 +02:00 committed by David S. Miller
parent 1cb9dfca39
commit 473d924d7d
2 changed files with 16 additions and 2 deletions
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9
net/can/bcm.c
View file

@ -1680,6 +1680,13 @@ static int bcm_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
return size;
}
int bcm_sock_no_ioctlcmd(struct socket *sock, unsigned int cmd,
unsigned long arg)
{
/* no ioctls for socket layer -> hand it down to NIC layer */
return -ENOIOCTLCMD;
}
static const struct proto_ops bcm_ops = {
.family = PF_CAN,
.release = bcm_release,
@ -1689,7 +1696,7 @@ static const struct proto_ops bcm_ops = {
.accept = sock_no_accept,
.getname = sock_no_getname,
.poll = datagram_poll,
.ioctl = sock_no_ioctl,
.ioctl = bcm_sock_no_ioctlcmd,
.gettstamp = sock_gettstamp,
.listen = sock_no_listen,
.shutdown = sock_no_shutdown,

9
net/can/raw.c
View file

@ -837,6 +837,13 @@ static int raw_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
return size;
}
int raw_sock_no_ioctlcmd(struct socket *sock, unsigned int cmd,
unsigned long arg)
{
/* no ioctls for socket layer -> hand it down to NIC layer */
return -ENOIOCTLCMD;
}
static const struct proto_ops raw_ops = {
.family = PF_CAN,
.release = raw_release,
@ -846,7 +853,7 @@ static const struct proto_ops raw_ops = {
.accept = sock_no_accept,
.getname = raw_getname,
.poll = datagram_poll,
.ioctl = sock_no_ioctl,
.ioctl = raw_sock_no_ioctlcmd,
.gettstamp = sock_gettstamp,
.listen = sock_no_listen,
.shutdown = sock_no_shutdown,