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ipv6: Convert net.ipv6.conf.${DEV}.XXX sysctl to per-netns RTNL.

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net.ipv6.conf.${DEV}.XXX sysctl are changed under RTNL:

  * forwarding
  * ignore_routes_with_linkdown
  * disable_ipv6
  * proxy_ndp
  * addr_gen_mode
  * stable_secret
  * disable_policy

Let's use rtnl_net_lock() there.

Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Link: https://patch.msgid.link/20250115080608.28127-3-kuniyu@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Kuniyuki Iwashima
2025-01-15 17:05:59 +09:00
committed by Jakub Kicinski
parent f7a6082b5e
commit 93c839e3ed
1 changed files with 30 additions and 30 deletions
Download Patch File Download Diff File Expand all files Collapse all files

60
net/ipv6/addrconf.c
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@@ -852,7 +852,7 @@ static void addrconf_forward_change(struct net *net, __s32 newf)
struct inet6_dev *idev;
for_each_netdev(net, dev) {
idev = __in6_dev_get(dev);
idev = __in6_dev_get_rtnl_net(dev);
if (idev) {
int changed = (!idev->cnf.forwarding) ^ (!newf);
@@ -865,13 +865,12 @@ static void addrconf_forward_change(struct net *net, __s32 newf)
static int addrconf_fixup_forwarding(const struct ctl_table *table, int *p, int newf)
{
struct net *net;
struct net *net = (struct net *)table->extra2;
int old;
if (!rtnl_trylock())
if (!rtnl_net_trylock(net))
return restart_syscall();
net = (struct net *)table->extra2;
old = *p;
WRITE_ONCE(*p, newf);
@@ -881,7 +880,7 @@ static int addrconf_fixup_forwarding(const struct ctl_table *table, int *p, int
NETCONFA_FORWARDING,
NETCONFA_IFINDEX_DEFAULT,
net->ipv6.devconf_dflt);
rtnl_unlock();
rtnl_net_unlock(net);
return 0;
}
@@ -903,7 +902,7 @@ static int addrconf_fixup_forwarding(const struct ctl_table *table, int *p, int
net->ipv6.devconf_all);
} else if ((!newf) ^ (!old))
dev_forward_change((struct inet6_dev *)table->extra1);
rtnl_unlock();
rtnl_net_unlock(net);
if (newf)
rt6_purge_dflt_routers(net);
@@ -916,7 +915,7 @@ static void addrconf_linkdown_change(struct net *net, __s32 newf)
struct inet6_dev *idev;
for_each_netdev(net, dev) {
idev = __in6_dev_get(dev);
idev = __in6_dev_get_rtnl_net(dev);
if (idev) {
int changed = (!idev->cnf.ignore_routes_with_linkdown) ^ (!newf);
@@ -933,13 +932,12 @@ static void addrconf_linkdown_change(struct net *net, __s32 newf)
static int addrconf_fixup_linkdown(const struct ctl_table *table, int *p, int newf)
{
struct net *net;
struct net *net = (struct net *)table->extra2;
int old;
if (!rtnl_trylock())
if (!rtnl_net_trylock(net))
return restart_syscall();
net = (struct net *)table->extra2;
old = *p;
WRITE_ONCE(*p, newf);
@@ -950,7 +948,7 @@ static int addrconf_fixup_linkdown(const struct ctl_table *table, int *p, int ne
NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN,
NETCONFA_IFINDEX_DEFAULT,
net->ipv6.devconf_dflt);
rtnl_unlock();
rtnl_net_unlock(net);
return 0;
}
@@ -964,7 +962,8 @@ static int addrconf_fixup_linkdown(const struct ctl_table *table, int *p, int ne
NETCONFA_IFINDEX_ALL,
net->ipv6.devconf_all);
}
rtnl_unlock();
rtnl_net_unlock(net);
return 1;
}
@@ -6370,7 +6369,7 @@ static void addrconf_disable_change(struct net *net, __s32 newf)
struct inet6_dev *idev;
for_each_netdev(net, dev) {
idev = __in6_dev_get(dev);
idev = __in6_dev_get_rtnl_net(dev);
if (idev) {
int changed = (!idev->cnf.disable_ipv6) ^ (!newf);
@@ -6391,7 +6390,7 @@ static int addrconf_disable_ipv6(const struct ctl_table *table, int *p, int newf
return 0;
}
if (!rtnl_trylock())
if (!rtnl_net_trylock(net))
return restart_syscall();
old = *p;
@@ -6400,10 +6399,11 @@ static int addrconf_disable_ipv6(const struct ctl_table *table, int *p, int newf
if (p == &net->ipv6.devconf_all->disable_ipv6) {
WRITE_ONCE(net->ipv6.devconf_dflt->disable_ipv6, newf);
addrconf_disable_change(net, newf);
} else if ((!newf) ^ (!old))
} else if ((!newf) ^ (!old)) {
dev_disable_change((struct inet6_dev *)table->extra1);
}
rtnl_unlock();
rtnl_net_unlock(net);
return 0;
}
@@ -6446,20 +6446,20 @@ static int addrconf_sysctl_proxy_ndp(const struct ctl_table *ctl, int write,
if (write && old != new) {
struct net *net = ctl->extra2;
if (!rtnl_trylock())
if (!rtnl_net_trylock(net))
return restart_syscall();
if (valp == &net->ipv6.devconf_dflt->proxy_ndp)
if (valp == &net->ipv6.devconf_dflt->proxy_ndp) {
inet6_netconf_notify_devconf(net, RTM_NEWNETCONF,
NETCONFA_PROXY_NEIGH,
NETCONFA_IFINDEX_DEFAULT,
net->ipv6.devconf_dflt);
else if (valp == &net->ipv6.devconf_all->proxy_ndp)
} else if (valp == &net->ipv6.devconf_all->proxy_ndp) {
inet6_netconf_notify_devconf(net, RTM_NEWNETCONF,
NETCONFA_PROXY_NEIGH,
NETCONFA_IFINDEX_ALL,
net->ipv6.devconf_all);
else {
} else {
struct inet6_dev *idev = ctl->extra1;
inet6_netconf_notify_devconf(net, RTM_NEWNETCONF,
@@ -6467,7 +6467,7 @@ static int addrconf_sysctl_proxy_ndp(const struct ctl_table *ctl, int write,
idev->dev->ifindex,
&idev->cnf);
}
rtnl_unlock();
rtnl_net_unlock(net);
}
return ret;
@@ -6487,7 +6487,7 @@ static int addrconf_sysctl_addr_gen_mode(const struct ctl_table *ctl, int write,
.mode = ctl->mode,
};
if (!rtnl_trylock())
if (!rtnl_net_trylock(net))
return restart_syscall();
new_val = *((u32 *)ctl->data);
@@ -6517,7 +6517,7 @@ static int addrconf_sysctl_addr_gen_mode(const struct ctl_table *ctl, int write,
WRITE_ONCE(net->ipv6.devconf_dflt->addr_gen_mode, new_val);
for_each_netdev(net, dev) {
idev = __in6_dev_get(dev);
idev = __in6_dev_get_rtnl_net(dev);
if (idev &&
idev->cnf.addr_gen_mode != new_val) {
WRITE_ONCE(idev->cnf.addr_gen_mode,
@@ -6531,7 +6531,7 @@ static int addrconf_sysctl_addr_gen_mode(const struct ctl_table *ctl, int write,
}
out:
rtnl_unlock();
rtnl_net_unlock(net);
return ret;
}
@@ -6553,7 +6553,7 @@ static int addrconf_sysctl_stable_secret(const struct ctl_table *ctl, int write,
lctl.maxlen = IPV6_MAX_STRLEN;
lctl.data = str;
if (!rtnl_trylock())
if (!rtnl_net_trylock(net))
return restart_syscall();
if (!write && !secret->initialized) {
@@ -6583,7 +6583,7 @@ static int addrconf_sysctl_stable_secret(const struct ctl_table *ctl, int write,
struct net_device *dev;
for_each_netdev(net, dev) {
struct inet6_dev *idev = __in6_dev_get(dev);
struct inet6_dev *idev = __in6_dev_get_rtnl_net(dev);
if (idev) {
WRITE_ONCE(idev->cnf.addr_gen_mode,
@@ -6598,7 +6598,7 @@ static int addrconf_sysctl_stable_secret(const struct ctl_table *ctl, int write,
}
out:
rtnl_unlock();
rtnl_net_unlock(net);
return err;
}
@@ -6682,7 +6682,7 @@ int addrconf_disable_policy(const struct ctl_table *ctl, int *valp, int val)
return 0;
}
if (!rtnl_trylock())
if (!rtnl_net_trylock(net))
return restart_syscall();
WRITE_ONCE(*valp, val);
@@ -6691,7 +6691,7 @@ int addrconf_disable_policy(const struct ctl_table *ctl, int *valp, int val)
struct net_device *dev;
for_each_netdev(net, dev) {
idev = __in6_dev_get(dev);
idev = __in6_dev_get_rtnl_net(dev);
if (idev)
addrconf_disable_policy_idev(idev, val);
}
@@ -6700,7 +6700,7 @@ int addrconf_disable_policy(const struct ctl_table *ctl, int *valp, int val)
addrconf_disable_policy_idev(idev, val);
}
rtnl_unlock();
rtnl_net_unlock(net);
return 0;
}