From ad2f99aedf8fa77f3ae647153284fa63c43d3055 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Tue, 27 Jul 2021 15:45:16 +0200 Subject: [PATCH] net: bridge: move bridge ioctls out of .ndo_do_ioctl Working towards obsoleting the .ndo_do_ioctl operation entirely, stop passing the SIOCBRADDIF/SIOCBRDELIF device ioctl commands into this callback. My first attempt was to add another ndo_siocbr() callback, but as there is only a single driver that takes these commands and there is already a hook mechanism to call directly into this driver, extend this hook instead, and use it for both the deviceless and the device specific ioctl commands. Cc: Roopa Prabhu Cc: Nikolay Aleksandrov Cc: bridge@lists.linux-foundation.org Signed-off-by: Arnd Bergmann Signed-off-by: David S. Miller --- include/linux/if_bridge.h | 7 ++++++- net/bridge/br.c | 2 +- net/bridge/br_device.c | 1 - net/bridge/br_ioctl.c | 15 +++------------ net/bridge/br_private.h | 5 ++--- net/core/dev_ioctl.c | 11 ++++++++--- net/socket.c | 33 +++++++++++++++++++++++---------- 7 files changed, 43 insertions(+), 31 deletions(-) diff --git a/include/linux/if_bridge.h b/include/linux/if_bridge.h index b73b4ff749e1..21daed10322e 100644 --- a/include/linux/if_bridge.h +++ b/include/linux/if_bridge.h @@ -61,7 +61,12 @@ struct br_ip_list { #define BR_DEFAULT_AGEING_TIME (300 * HZ) -extern void brioctl_set(int (*ioctl_hook)(struct net *, unsigned int, void __user *)); +struct net_bridge; +void brioctl_set(int (*hook)(struct net *net, struct net_bridge *br, + unsigned int cmd, struct ifreq *ifr, + void __user *uarg)); +int br_ioctl_call(struct net *net, struct net_bridge *br, unsigned int cmd, + struct ifreq *ifr, void __user *uarg); #if IS_ENABLED(CONFIG_BRIDGE) && IS_ENABLED(CONFIG_BRIDGE_IGMP_SNOOPING) int br_multicast_list_adjacent(struct net_device *dev, diff --git a/net/bridge/br.c b/net/bridge/br.c index 51f2e25c4cd6..8fb5dca5f8e0 100644 --- a/net/bridge/br.c +++ b/net/bridge/br.c @@ -359,7 +359,7 @@ static int __init br_init(void) if (err) goto err_out5; - brioctl_set(br_ioctl_deviceless_stub); + brioctl_set(br_ioctl_stub); #if IS_ENABLED(CONFIG_ATM_LANE) br_fdb_test_addr_hook = br_fdb_test_addr; diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c index 1952bb433ca7..8d6bab244c4a 100644 --- a/net/bridge/br_device.c +++ b/net/bridge/br_device.c @@ -454,7 +454,6 @@ static const struct net_device_ops br_netdev_ops = { .ndo_set_rx_mode = br_dev_set_multicast_list, .ndo_change_rx_flags = br_dev_change_rx_flags, .ndo_change_mtu = br_change_mtu, - .ndo_do_ioctl = br_dev_ioctl, .ndo_siocdevprivate = br_dev_siocdevprivate, #ifdef CONFIG_NET_POLL_CONTROLLER .ndo_netpoll_setup = br_netpoll_setup, diff --git a/net/bridge/br_ioctl.c b/net/bridge/br_ioctl.c index 9f924fe43641..46a24c20e405 100644 --- a/net/bridge/br_ioctl.c +++ b/net/bridge/br_ioctl.c @@ -366,7 +366,8 @@ static int old_deviceless(struct net *net, void __user *uarg) return -EOPNOTSUPP; } -int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *uarg) +int br_ioctl_stub(struct net *net, struct net_bridge *br, unsigned int cmd, + struct ifreq *ifr, void __user *uarg) { switch (cmd) { case SIOCGIFBR: @@ -390,21 +391,11 @@ int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *uar return br_del_bridge(net, buf); } - } - return -EOPNOTSUPP; -} -int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) -{ - struct net_bridge *br = netdev_priv(dev); - - switch (cmd) { case SIOCBRADDIF: case SIOCBRDELIF: - return add_del_if(br, rq->ifr_ifindex, cmd == SIOCBRADDIF); + return add_del_if(br, ifr->ifr_ifindex, cmd == SIOCBRADDIF); } - - br_debug(br, "Bridge does not support ioctl 0x%x\n", cmd); return -EOPNOTSUPP; } diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h index 572c28ae41b8..f2d34ea1ea37 100644 --- a/net/bridge/br_private.h +++ b/net/bridge/br_private.h @@ -851,11 +851,10 @@ br_port_get_check_rtnl(const struct net_device *dev) } /* br_ioctl.c */ -int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); int br_dev_siocdevprivate(struct net_device *dev, struct ifreq *rq, void __user *data, int cmd); -int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, - void __user *arg); +int br_ioctl_stub(struct net *net, struct net_bridge *br, unsigned int cmd, + struct ifreq *ifr, void __user *uarg); /* br_multicast.c */ #ifdef CONFIG_BRIDGE_IGMP_SNOOPING diff --git a/net/core/dev_ioctl.c b/net/core/dev_ioctl.c index 70a379cee5fd..3166f196b296 100644 --- a/net/core/dev_ioctl.c +++ b/net/core/dev_ioctl.c @@ -6,6 +6,7 @@ #include #include #include +#include #include #include @@ -374,6 +375,12 @@ static int dev_ifsioc(struct net *net, struct ifreq *ifr, void __user *data, case SIOCWANDEV: return dev_siocwandev(dev, &ifr->ifr_settings); + case SIOCBRADDIF: + case SIOCBRDELIF: + if (!netif_device_present(dev)) + return -ENODEV; + return br_ioctl_call(net, netdev_priv(dev), cmd, ifr, NULL); + case SIOCSHWTSTAMP: err = net_hwtstamp_validate(ifr); if (err) @@ -399,9 +406,7 @@ static int dev_ifsioc(struct net *net, struct ifreq *ifr, void __user *data, cmd == SIOCBONDSETHWADDR || cmd == SIOCBONDSLAVEINFOQUERY || cmd == SIOCBONDINFOQUERY || - cmd == SIOCBONDCHANGEACTIVE || - cmd == SIOCBRADDIF || - cmd == SIOCBRDELIF) { + cmd == SIOCBONDCHANGEACTIVE) { err = dev_do_ioctl(dev, ifr, cmd); } else err = -EINVAL; diff --git a/net/socket.c b/net/socket.c index 48471a219c1d..42665bd99ea4 100644 --- a/net/socket.c +++ b/net/socket.c @@ -1064,9 +1064,13 @@ static ssize_t sock_write_iter(struct kiocb *iocb, struct iov_iter *from) */ static DEFINE_MUTEX(br_ioctl_mutex); -static int (*br_ioctl_hook) (struct net *, unsigned int cmd, void __user *arg); +static int (*br_ioctl_hook)(struct net *net, struct net_bridge *br, + unsigned int cmd, struct ifreq *ifr, + void __user *uarg); -void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *)) +void brioctl_set(int (*hook)(struct net *net, struct net_bridge *br, + unsigned int cmd, struct ifreq *ifr, + void __user *uarg)) { mutex_lock(&br_ioctl_mutex); br_ioctl_hook = hook; @@ -1074,6 +1078,22 @@ void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *)) } EXPORT_SYMBOL(brioctl_set); +int br_ioctl_call(struct net *net, struct net_bridge *br, unsigned int cmd, + struct ifreq *ifr, void __user *uarg) +{ + int err = -ENOPKG; + + if (!br_ioctl_hook) + request_module("bridge"); + + mutex_lock(&br_ioctl_mutex); + if (br_ioctl_hook) + err = br_ioctl_hook(net, br, cmd, ifr, uarg); + mutex_unlock(&br_ioctl_mutex); + + return err; +} + static DEFINE_MUTEX(vlan_ioctl_mutex); static int (*vlan_ioctl_hook) (struct net *, void __user *arg); @@ -1162,14 +1182,7 @@ static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg) case SIOCSIFBR: case SIOCBRADDBR: case SIOCBRDELBR: - err = -ENOPKG; - if (!br_ioctl_hook) - request_module("bridge"); - - mutex_lock(&br_ioctl_mutex); - if (br_ioctl_hook) - err = br_ioctl_hook(net, cmd, argp); - mutex_unlock(&br_ioctl_mutex); + err = br_ioctl_call(net, NULL, cmd, NULL, argp); break; case SIOCGIFVLAN: case SIOCSIFVLAN: