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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 <roopa@nvidia.com>
Cc: Nikolay Aleksandrov <nikolay@nvidia.com>
Cc: bridge@lists.linux-foundation.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnd Bergmann 2021-07-27 15:45:16 +02:00 committed by David S. Miller
parent 88fc023f7d
commit ad2f99aedf
7 changed files with 43 additions and 31 deletions
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7
include/linux/if_bridge.h
View File

@ -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,

2
net/bridge/br.c
View File

@ -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;

1
net/bridge/br_device.c
View File

@ -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,

15
net/bridge/br_ioctl.c
View File

@ -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;
}

5
net/bridge/br_private.h
View File

@ -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

11
net/core/dev_ioctl.c
View File

@ -6,6 +6,7 @@
#include <linux/rtnetlink.h>
#include <linux/net_tstamp.h>
#include <linux/wireless.h>
#include <linux/if_bridge.h>
#include <net/dsa.h>
#include <net/wext.h>
@ -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;

33
net/socket.c
View File

@ -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: