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authorOliver Hartkopp <socketcan@hartkopp.net>2019-07-29 23:40:56 +0300
committerDavid S. Miller <davem@davemloft.net>2019-07-30 00:12:35 +0300
commit473d924d7d46cb57aa4c1863261d18366af345af (patch)
tree797f90f9d80608f7e7175511617de44ecdc7fbea /net
parent1cb9dfca39eb406960f8f84864ddd6ba329ec321 (diff)
downloadlinux-473d924d7d46cb57aa4c1863261d18366af345af.tar.xz
can: fix ioctl function removal
Commit 60649d4e0af ("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: 60649d4e0af ("can: remove obsolete empty ioctl() handler") Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/can/bcm.c9
-rw-r--r--net/can/raw.c9
2 files changed, 16 insertions, 2 deletions
diff --git a/net/can/bcm.c b/net/can/bcm.c
index 8da986b19d88..bf1d0bbecec8 100644
--- a/net/can/bcm.c
+++ b/net/can/bcm.c
@@ -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,
diff --git a/net/can/raw.c b/net/can/raw.c
index ff720272f7b7..da386f1fa815 100644
--- a/net/can/raw.c
+++ b/net/can/raw.c
@@ -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,