Netdev Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Arnd Bergmann <arnd@kernel.org>
To: netdev@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, Jakub Kicinski <kuba@kernel.org>,
"David S. Miller" <davem@davemloft.net>,
Arnd Bergmann <arnd@arndb.de>, Roopa Prabhu <roopa@nvidia.com>,
Nikolay Aleksandrov <nikolay@nvidia.com>,
bridge@lists.linux-foundation.org
Subject: [PATCH net-next v3 05/31] bridge: use ndo_siocdevprivate
Date: Tue, 27 Jul 2021 15:44:51 +0200 [thread overview]
Message-ID: <20210727134517.1384504-6-arnd@kernel.org> (raw)
In-Reply-To: <20210727134517.1384504-1-arnd@kernel.org>
From: Arnd Bergmann <arnd@arndb.de>
The bridge driver has an old set of ioctls using the SIOCDEVPRIVATE
namespace that have never worked in compat mode and are explicitly
forbidden already.
Move them over to ndo_siocdevprivate and fix compat mode for these,
because we can.
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>
---
net/bridge/br_device.c | 1 +
net/bridge/br_ioctl.c | 37 +++++++++++++++++++++++++------------
net/bridge/br_private.h | 2 ++
3 files changed, 28 insertions(+), 12 deletions(-)
diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c
index 00daf35f54d5..1952bb433ca7 100644
--- a/net/bridge/br_device.c
+++ b/net/bridge/br_device.c
@@ -455,6 +455,7 @@ static const struct net_device_ops br_netdev_ops = {
.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,
.ndo_netpoll_cleanup = br_netpoll_cleanup,
diff --git a/net/bridge/br_ioctl.c b/net/bridge/br_ioctl.c
index 2db800fc27ca..9f924fe43641 100644
--- a/net/bridge/br_ioctl.c
+++ b/net/bridge/br_ioctl.c
@@ -106,15 +106,32 @@ static int add_del_if(struct net_bridge *br, int ifindex, int isadd)
* This interface is deprecated because it was too difficult
* to do the translation for 32/64bit ioctl compatibility.
*/
-static int old_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)
{
struct net_bridge *br = netdev_priv(dev);
struct net_bridge_port *p = NULL;
unsigned long args[4];
+ void __user *argp;
int ret = -EOPNOTSUPP;
- if (copy_from_user(args, rq->ifr_data, sizeof(args)))
- return -EFAULT;
+ if (in_compat_syscall()) {
+ unsigned int cargs[4];
+
+ if (copy_from_user(cargs, data, sizeof(cargs)))
+ return -EFAULT;
+
+ args[0] = cargs[0];
+ args[1] = cargs[1];
+ args[2] = cargs[2];
+ args[3] = cargs[3];
+
+ argp = compat_ptr(args[1]);
+ } else {
+ if (copy_from_user(args, data, sizeof(args)))
+ return -EFAULT;
+
+ argp = (void __user *)args[1];
+ }
switch (args[0]) {
case BRCTL_ADD_IF:
@@ -171,7 +188,7 @@ static int old_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
return -ENOMEM;
get_port_ifindices(br, indices, num);
- if (copy_to_user((void __user *)args[1], indices, num*sizeof(int)))
+ if (copy_to_user(argp, indices, num * sizeof(int)))
num = -EFAULT;
kfree(indices);
return num;
@@ -232,7 +249,7 @@ static int old_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
rcu_read_unlock();
- if (copy_to_user((void __user *)args[1], &p, sizeof(p)))
+ if (copy_to_user(argp, &p, sizeof(p)))
return -EFAULT;
return 0;
@@ -282,8 +299,7 @@ static int old_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
}
case BRCTL_GET_FDB_ENTRIES:
- return get_fdb_entries(br, (void __user *)args[1],
- args[2], args[3]);
+ return get_fdb_entries(br, argp, args[2], args[3]);
}
if (!ret) {
@@ -320,7 +336,7 @@ static int old_deviceless(struct net *net, void __user *uarg)
args[2] = get_bridge_ifindices(net, indices, args[2]);
- ret = copy_to_user((void __user *)args[1], indices, args[2]*sizeof(int))
+ ret = copy_to_user(uarg, indices, args[2]*sizeof(int))
? -EFAULT : args[2];
kfree(indices);
@@ -335,7 +351,7 @@ static int old_deviceless(struct net *net, void __user *uarg)
if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
return -EPERM;
- if (copy_from_user(buf, (void __user *)args[1], IFNAMSIZ))
+ if (copy_from_user(buf, uarg, IFNAMSIZ))
return -EFAULT;
buf[IFNAMSIZ-1] = 0;
@@ -383,9 +399,6 @@ int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
struct net_bridge *br = netdev_priv(dev);
switch (cmd) {
- case SIOCDEVPRIVATE:
- return old_dev_ioctl(dev, rq, cmd);
-
case SIOCBRADDIF:
case SIOCBRDELIF:
return add_del_if(br, rq->ifr_ifindex, cmd == SIOCBRADDIF);
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index 1c57877270f7..572c28ae41b8 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -852,6 +852,8 @@ 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);
--
2.29.2
next prev parent reply other threads:[~2021-07-27 13:46 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-27 13:44 [PATCH net-next v3 00/31] ndo_ioctl rework Arnd Bergmann
2021-07-27 13:44 ` [PATCH net-next v3 01/31] net: split out SIOCDEVPRIVATE handling from dev_ioctl Arnd Bergmann
2021-07-27 13:44 ` [PATCH net-next v3 02/31] staging: rtlwifi: use siocdevprivate Arnd Bergmann
2021-07-27 13:44 ` [PATCH net-next v3 03/31] staging: wlan-ng: " Arnd Bergmann
2021-07-27 13:44 ` [PATCH net-next v3 04/31] hostap: use ndo_siocdevprivate Arnd Bergmann
2021-07-28 7:07 ` Kalle Valo
2021-07-27 13:44 ` Arnd Bergmann [this message]
2021-07-27 13:44 ` [PATCH net-next v3 06/31] phonet: use siocdevprivate Arnd Bergmann
2021-07-27 16:03 ` Rémi Denis-Courmont
2021-07-27 13:44 ` [PATCH net-next v3 07/31] tulip: use ndo_siocdevprivate Arnd Bergmann
2021-07-27 13:44 ` [PATCH net-next v3 08/31] bonding: use siocdevprivate Arnd Bergmann
2021-07-27 13:44 ` [PATCH net-next v3 09/31] appletalk: use ndo_siocdevprivate Arnd Bergmann
2021-07-27 13:44 ` [PATCH net-next v3 10/31] hamachi: " Arnd Bergmann
2021-07-27 13:44 ` [PATCH net-next v3 11/31] tehuti: " Arnd Bergmann
2021-07-27 13:44 ` [PATCH net-next v3 12/31] eql: " Arnd Bergmann
2021-07-27 13:44 ` [PATCH net-next v3 13/31] fddi: " Arnd Bergmann
2021-07-27 13:45 ` [PATCH net-next v3 14/31] net: usb: " Arnd Bergmann
2021-07-28 13:02 ` Petko Manolov
2021-07-27 13:45 ` [PATCH net-next v3 15/31] slip/plip: " Arnd Bergmann
2021-07-27 13:45 ` [PATCH net-next v3 16/31] qeth: " Arnd Bergmann
2021-07-27 13:45 ` [PATCH net-next v3 17/31] cxgb3: " Arnd Bergmann
2021-07-27 13:45 ` [PATCH net-next v3 18/31] hamradio: " Arnd Bergmann
2021-07-27 13:45 ` [PATCH net-next v3 19/31] airo: " Arnd Bergmann
2021-07-27 13:45 ` [PATCH net-next v3 20/31] ip_tunnel: " Arnd Bergmann
2021-07-27 13:45 ` [PATCH net-next v3 21/31] hippi: " Arnd Bergmann
2021-07-27 13:45 ` [PATCH net-next v3 22/31] sb1000: " Arnd Bergmann
2021-07-27 13:45 ` [PATCH net-next v3 23/31] ppp: " Arnd Bergmann
2021-07-27 13:45 ` [PATCH net-next v3 24/31] wan: " Arnd Bergmann
2021-07-27 13:45 ` [PATCH net-next v3 25/31] wan: cosa: remove dead cosa_net_ioctl() function Arnd Bergmann
2021-07-27 13:45 ` [PATCH net-next v3 26/31] dev_ioctl: pass SIOCDEVPRIVATE data separately Arnd Bergmann
2021-07-27 13:45 ` [PATCH net-next v3 27/31] dev_ioctl: split out ndo_eth_ioctl Arnd Bergmann
2021-07-27 16:30 ` Jason Gunthorpe
2021-07-27 13:45 ` [PATCH net-next v3 28/31] net: split out ndo_siowandev ioctl Arnd Bergmann
2021-07-27 13:45 ` [PATCH net-next v3 29/31] net: socket: return changed ifreq from SIOCDEVPRIVATE Arnd Bergmann
2021-07-27 13:45 ` [PATCH net-next v3 30/31] net: bridge: move bridge ioctls out of .ndo_do_ioctl Arnd Bergmann
2021-07-27 13:45 ` [PATCH net-next v3 31/31] net: bonding: move ioctl handling to private ndo operation Arnd Bergmann
2021-07-27 20:00 ` [PATCH net-next v3 00/31] ndo_ioctl rework patchwork-bot+netdevbpf
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210727134517.1384504-6-arnd@kernel.org \
--to=arnd@kernel.org \
--cc=arnd@arndb.de \
--cc=bridge@lists.linux-foundation.org \
--cc=davem@davemloft.net \
--cc=kuba@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=netdev@vger.kernel.org \
--cc=nikolay@nvidia.com \
--cc=roopa@nvidia.com \
--subject='Re: [PATCH net-next v3 05/31] bridge: use ndo_siocdevprivate' \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).