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Message-Id: <20171202204408.4166-5-fw@strlen.de>
Date: Sat, 2 Dec 2017 21:44:08 +0100
From: Florian Westphal <fw@...len.de>
To: <netdev@...r.kernel.org>
Cc: Florian Westphal <fw@...len.de>
Subject: [PATCH net-next 4/4] rtnetlink: remove __rtnl_register
This removes __rtnl_register and switches callers to either
rtnl_register or rtnl_register_module.
Also, rtnl_register() will now print an error if memory allocation
failed rather than panic the kernel.
Signed-off-by: Florian Westphal <fw@...len.de>
---
include/net/rtnetlink.h | 2 --
net/core/rtnetlink.c | 33 ++++++++-------------------------
net/ipv6/addrconf.c | 44 ++++++++++++++++++++++++++++++--------------
net/ipv6/addrlabel.c | 13 ++++++-------
net/ipv6/ip6_fib.c | 4 ++--
net/ipv6/route.c | 20 +++++++++++++++-----
6 files changed, 61 insertions(+), 55 deletions(-)
diff --git a/include/net/rtnetlink.h b/include/net/rtnetlink.h
index e326b3f9eb5f..14b6b3af8918 100644
--- a/include/net/rtnetlink.h
+++ b/include/net/rtnetlink.h
@@ -13,8 +13,6 @@ enum rtnl_link_flags {
RTNL_FLAG_DOIT_UNLOCKED = 1,
};
-int __rtnl_register(int protocol, int msgtype,
- rtnl_doit_func, rtnl_dumpit_func, unsigned int flags);
void rtnl_register(int protocol, int msgtype,
rtnl_doit_func, rtnl_dumpit_func, unsigned int flags);
int rtnl_register_module(struct module *owner, int protocol, int msgtype,
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index de6390365c90..fb2d61df1e2f 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -238,7 +238,7 @@ int rtnl_register_module(struct module *owner,
EXPORT_SYMBOL_GPL(rtnl_register_module);
/**
- * __rtnl_register - Register a rtnetlink message type
+ * rtnl_register - Register a rtnetlink message type
* @protocol: Protocol family or PF_UNSPEC
* @msgtype: rtnetlink message type
* @doit: Function pointer called for each request message
@@ -252,35 +252,18 @@ EXPORT_SYMBOL_GPL(rtnl_register_module);
* The special protocol family PF_UNSPEC may be used to define fallback
* function pointers for the case when no entry for the specific protocol
* family exists.
- *
- * Returns 0 on success or a negative error code.
- */
-int __rtnl_register(int protocol, int msgtype,
- rtnl_doit_func doit, rtnl_dumpit_func dumpit,
- unsigned int flags)
-{
- return rtnl_register_internal(NULL, protocol, msgtype,
- doit, dumpit, flags);
-}
-EXPORT_SYMBOL_GPL(__rtnl_register);
-
-/**
- * rtnl_register - Register a rtnetlink message type
- *
- * Identical to __rtnl_register() but panics on failure. This is useful
- * as failure of this function is very unlikely, it can only happen due
- * to lack of memory when allocating the chain to store all message
- * handlers for a protocol. Meant for use in init functions where lack
- * of memory implies no sense in continuing.
*/
void rtnl_register(int protocol, int msgtype,
rtnl_doit_func doit, rtnl_dumpit_func dumpit,
unsigned int flags)
{
- if (__rtnl_register(protocol, msgtype, doit, dumpit, flags) < 0)
- panic("Unable to register rtnetlink message handler, "
- "protocol = %d, message type = %d\n",
- protocol, msgtype);
+ int err;
+
+ err = rtnl_register_internal(NULL, protocol, msgtype, doit, dumpit,
+ flags);
+ if (err)
+ pr_err("Unable to register rtnetlink message handler, "
+ "protocol = %d, message type = %d\n", protocol, msgtype);
}
EXPORT_SYMBOL_GPL(rtnl_register);
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index f49bd7897e95..a5ad8425551a 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -6595,27 +6595,43 @@ int __init addrconf_init(void)
rtnl_af_register(&inet6_ops);
- err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo,
- 0);
+ err = rtnl_register_module(THIS_MODULE, PF_INET6, RTM_GETLINK,
+ NULL, inet6_dump_ifinfo, 0);
if (err < 0)
goto errout;
- /* Only the first call to __rtnl_register can fail */
- __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL, 0);
- __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL, 0);
- __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr,
- inet6_dump_ifaddr, RTNL_FLAG_DOIT_UNLOCKED);
- __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL,
- inet6_dump_ifmcaddr, 0);
- __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL,
- inet6_dump_ifacaddr, 0);
- __rtnl_register(PF_INET6, RTM_GETNETCONF, inet6_netconf_get_devconf,
- inet6_netconf_dump_devconf, RTNL_FLAG_DOIT_UNLOCKED);
-
+ err = rtnl_register_module(THIS_MODULE, PF_INET6, RTM_NEWADDR,
+ inet6_rtm_newaddr, NULL, 0);
+ if (err < 0)
+ goto errout;
+ err = rtnl_register_module(THIS_MODULE, PF_INET6, RTM_DELADDR,
+ inet6_rtm_deladdr, NULL, 0);
+ if (err < 0)
+ goto errout;
+ err = rtnl_register_module(THIS_MODULE, PF_INET6, RTM_GETADDR,
+ inet6_rtm_getaddr, inet6_dump_ifaddr,
+ RTNL_FLAG_DOIT_UNLOCKED);
+ if (err < 0)
+ goto errout;
+ err = rtnl_register_module(THIS_MODULE, PF_INET6, RTM_GETMULTICAST,
+ NULL, inet6_dump_ifmcaddr, 0);
+ if (err < 0)
+ goto errout;
+ err = rtnl_register_module(THIS_MODULE, PF_INET6, RTM_GETANYCAST,
+ NULL, inet6_dump_ifacaddr, 0);
+ if (err < 0)
+ goto errout;
+ err = rtnl_register_module(THIS_MODULE, PF_INET6, RTM_GETNETCONF,
+ inet6_netconf_get_devconf,
+ inet6_netconf_dump_devconf,
+ RTNL_FLAG_DOIT_UNLOCKED);
+ if (err < 0)
+ goto errout;
ipv6_addr_label_rtnl_register();
return 0;
errout:
+ rtnl_unregister_all(PF_INET6);
rtnl_af_unregister(&inet6_ops);
unregister_netdevice_notifier(&ipv6_dev_notf);
errlo:
diff --git a/net/ipv6/addrlabel.c b/net/ipv6/addrlabel.c
index 00e1f8ee08f8..303fcce5beef 100644
--- a/net/ipv6/addrlabel.c
+++ b/net/ipv6/addrlabel.c
@@ -549,11 +549,10 @@ static int ip6addrlbl_get(struct sk_buff *in_skb, struct nlmsghdr *nlh,
void __init ipv6_addr_label_rtnl_register(void)
{
- __rtnl_register(PF_INET6, RTM_NEWADDRLABEL, ip6addrlbl_newdel,
- NULL, RTNL_FLAG_DOIT_UNLOCKED);
- __rtnl_register(PF_INET6, RTM_DELADDRLABEL, ip6addrlbl_newdel,
- NULL, RTNL_FLAG_DOIT_UNLOCKED);
- __rtnl_register(PF_INET6, RTM_GETADDRLABEL, ip6addrlbl_get,
- ip6addrlbl_dump, RTNL_FLAG_DOIT_UNLOCKED);
+ rtnl_register(PF_INET6, RTM_NEWADDRLABEL, ip6addrlbl_newdel,
+ NULL, RTNL_FLAG_DOIT_UNLOCKED);
+ rtnl_register(PF_INET6, RTM_DELADDRLABEL, ip6addrlbl_newdel,
+ NULL, RTNL_FLAG_DOIT_UNLOCKED);
+ rtnl_register(PF_INET6, RTM_GETADDRLABEL, ip6addrlbl_get,
+ ip6addrlbl_dump, RTNL_FLAG_DOIT_UNLOCKED);
}
-
diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c
index c43cbaedfa35..a64d559fa513 100644
--- a/net/ipv6/ip6_fib.c
+++ b/net/ipv6/ip6_fib.c
@@ -2142,8 +2142,8 @@ int __init fib6_init(void)
if (ret)
goto out_kmem_cache_create;
- ret = __rtnl_register(PF_INET6, RTM_GETROUTE, NULL, inet6_dump_fib,
- 0);
+ ret = rtnl_register_module(THIS_MODULE, PF_INET6, RTM_GETROUTE, NULL,
+ inet6_dump_fib, 0);
if (ret)
goto out_unregister_subsys;
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 46fd53b268da..b3f4d19b3ca5 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -4772,11 +4772,20 @@ int __init ip6_route_init(void)
if (ret)
goto fib6_rules_init;
- ret = -ENOBUFS;
- if (__rtnl_register(PF_INET6, RTM_NEWROUTE, inet6_rtm_newroute, NULL, 0) ||
- __rtnl_register(PF_INET6, RTM_DELROUTE, inet6_rtm_delroute, NULL, 0) ||
- __rtnl_register(PF_INET6, RTM_GETROUTE, inet6_rtm_getroute, NULL,
- RTNL_FLAG_DOIT_UNLOCKED))
+ ret = rtnl_register_module(THIS_MODULE, PF_INET6, RTM_NEWROUTE,
+ inet6_rtm_newroute, NULL, 0);
+ if (ret < 0)
+ goto out_register_late_subsys;
+
+ ret = rtnl_register_module(THIS_MODULE, PF_INET6, RTM_DELROUTE,
+ inet6_rtm_delroute, NULL, 0);
+ if (ret < 0)
+ goto out_register_late_subsys;
+
+ ret = rtnl_register_module(THIS_MODULE, PF_INET6, RTM_GETROUTE,
+ inet6_rtm_getroute, NULL,
+ RTNL_FLAG_DOIT_UNLOCKED);
+ if (ret < 0)
goto out_register_late_subsys;
ret = register_netdevice_notifier(&ip6_route_dev_notifier);
@@ -4794,6 +4803,7 @@ int __init ip6_route_init(void)
return ret;
out_register_late_subsys:
+ rtnl_unregister_all(PF_INET6);
unregister_pernet_subsys(&ip6_route_net_late_ops);
fib6_rules_init:
fib6_rules_cleanup();
--
2.13.6
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