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Date: Thu, 22 Jul 2021 16:29:01 +0200
From: Arnd Bergmann <arnd@...nel.org>
To: netdev@...r.kernel.org
Cc: Arnd Bergmann <arnd@...db.de>, Al Viro <viro@...iv.linux.org.uk>,
Andrew Lunn <andrew@...n.ch>, Christoph Hellwig <hch@....de>,
David Ahern <dsahern@...nel.org>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
Jakub Kicinski <kuba@...nel.org>,
Kees Cook <keescook@...omium.org>,
Marco Elver <elver@...gle.com>, linux-kernel@...r.kernel.org,
linux-arch@...r.kernel.org
Subject: [PATCH net-next v6 4/6] net: socket: remove register_gifconf
From: Arnd Bergmann <arnd@...db.de>
Since dynamic registration of the gifconf() helper is only used for
IPv4, and this can not be in a loadable module, this can be simplified
noticeably by turning it into a direct function call as a preparation
for cleaning up the compat handling.
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
changes in v6:
- split register_gifconf from compat changes
---
include/linux/inetdevice.h | 9 ++++++++
include/linux/netdevice.h | 8 -------
net/core/dev_ioctl.c | 43 +++++++++-----------------------------
net/ipv4/devinet.c | 4 +---
4 files changed, 20 insertions(+), 44 deletions(-)
diff --git a/include/linux/inetdevice.h b/include/linux/inetdevice.h
index 53aa0343bf69..67e042932681 100644
--- a/include/linux/inetdevice.h
+++ b/include/linux/inetdevice.h
@@ -178,6 +178,15 @@ static inline struct net_device *ip_dev_find(struct net *net, __be32 addr)
int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b);
int devinet_ioctl(struct net *net, unsigned int cmd, struct ifreq *);
+#ifdef CONFIG_INET
+int inet_gifconf(struct net_device *dev, char __user *buf, int len, int size);
+#else
+static inline int inet_gifconf(struct net_device *dev, char __user *buf,
+ int len, int size)
+{
+ return 0;
+}
+#endif
void devinet_init(void);
struct in_device *inetdev_by_index(struct net *, int);
__be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope);
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 42f6f866d5f3..6630a9f0b0f0 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -3289,14 +3289,6 @@ static inline bool dev_has_header(const struct net_device *dev)
return dev->header_ops && dev->header_ops->create;
}
-typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr,
- int len, int size);
-int register_gifconf(unsigned int family, gifconf_func_t *gifconf);
-static inline int unregister_gifconf(unsigned int family)
-{
- return register_gifconf(family, NULL);
-}
-
#ifdef CONFIG_NET_FLOW_LIMIT
#define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */
struct sd_flow_limit {
diff --git a/net/core/dev_ioctl.c b/net/core/dev_ioctl.c
index 62f45da7ecfe..c22c3dc15ce9 100644
--- a/net/core/dev_ioctl.c
+++ b/net/core/dev_ioctl.c
@@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/kmod.h>
#include <linux/netdevice.h>
+#include <linux/inetdevice.h>
#include <linux/etherdevice.h>
#include <linux/rtnetlink.h>
#include <linux/net_tstamp.h>
@@ -25,26 +26,6 @@ static int dev_ifname(struct net *net, struct ifreq *ifr)
return netdev_get_name(net, ifr->ifr_name, ifr->ifr_ifindex);
}
-static gifconf_func_t *gifconf_list[NPROTO];
-
-/**
- * register_gifconf - register a SIOCGIF handler
- * @family: Address family
- * @gifconf: Function handler
- *
- * Register protocol dependent address dumping routines. The handler
- * that is passed must not be freed or reused until it has been replaced
- * by another handler.
- */
-int register_gifconf(unsigned int family, gifconf_func_t *gifconf)
-{
- if (family >= NPROTO)
- return -EINVAL;
- gifconf_list[family] = gifconf;
- return 0;
-}
-EXPORT_SYMBOL(register_gifconf);
-
/*
* Perform a SIOCGIFCONF call. This structure will change
* size eventually, and there is nothing I can do about it.
@@ -72,19 +53,15 @@ int dev_ifconf(struct net *net, struct ifconf *ifc, int size)
total = 0;
for_each_netdev(net, dev) {
- for (i = 0; i < NPROTO; i++) {
- if (gifconf_list[i]) {
- int done;
- if (!pos)
- done = gifconf_list[i](dev, NULL, 0, size);
- else
- done = gifconf_list[i](dev, pos + total,
- len - total, size);
- if (done < 0)
- return -EFAULT;
- total += done;
- }
- }
+ int done;
+ if (!pos)
+ done = inet_gifconf(dev, NULL, 0, size);
+ else
+ done = inet_gifconf(dev, pos + total,
+ len - total, size);
+ if (done < 0)
+ return -EFAULT;
+ total += done;
}
/*
diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index 94b648d9eaff..c82aded8da7d 100644
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -1243,7 +1243,7 @@ int devinet_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr)
return ret;
}
-static int inet_gifconf(struct net_device *dev, char __user *buf, int len, int size)
+int inet_gifconf(struct net_device *dev, char __user *buf, int len, int size)
{
struct in_device *in_dev = __in_dev_get_rtnl(dev);
const struct in_ifaddr *ifa;
@@ -2766,8 +2766,6 @@ void __init devinet_init(void)
INIT_HLIST_HEAD(&inet_addr_lst[i]);
register_pernet_subsys(&devinet_ops);
-
- register_gifconf(PF_INET, inet_gifconf);
register_netdevice_notifier(&ip_netdev_notifier);
queue_delayed_work(system_power_efficient_wq, &check_lifetime_work, 0);
--
2.29.2
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