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Message-Id: <20190529114332.19163-6-fw@strlen.de>
Date: Wed, 29 May 2019 13:43:30 +0200
From: Florian Westphal <fw@...len.de>
To: <netdev@...r.kernel.org>
Cc: eric.dumazet@...il.com, Florian Westphal <fw@...len.de>
Subject: [PATCH net-next 5/7] net: use new in_dev_ifa iterators
Use in_dev_for_each_ifa_rcu/rtnl instead.
This prevents sparse warnings once proper __rcu annotations are added.
Signed-off-by: Florian Westphal <fw@...len.de>
t di# Last commands done (6 commands done):
---
net/ipv4/fib_frontend.c | 24 +++++++++++++++++-------
net/ipv4/igmp.c | 5 +++--
net/ipv6/addrconf.c | 4 +---
net/sctp/protocol.c | 2 +-
net/smc/smc_clc.c | 11 +++++++----
5 files changed, 29 insertions(+), 17 deletions(-)
diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index 76055c66326a..c7cdb8d0d164 100644
--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c
@@ -540,14 +540,22 @@ static int rtentry_to_fib_config(struct net *net, int cmd, struct rtentry *rt,
cfg->fc_oif = dev->ifindex;
cfg->fc_table = l3mdev_fib_table(dev);
if (colon) {
- struct in_ifaddr *ifa;
- struct in_device *in_dev = __in_dev_get_rtnl(dev);
+ const struct in_ifaddr *ifa;
+ struct in_device *in_dev;
+
+ in_dev = __in_dev_get_rtnl(dev);
if (!in_dev)
return -ENODEV;
+
*colon = ':';
- for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next)
+
+ rcu_read_lock();
+ in_dev_for_each_ifa_rcu(ifa, in_dev) {
if (strcmp(ifa->ifa_label, devname) == 0)
break;
+ }
+ rcu_read_unlock();
+
if (!ifa)
return -ENODEV;
cfg->fc_prefsrc = ifa->ifa_local;
@@ -1177,8 +1185,8 @@ void fib_del_ifaddr(struct in_ifaddr *ifa, struct in_ifaddr *iprim)
*
* Scan address list to be sure that addresses are really gone.
*/
-
- for (ifa1 = in_dev->ifa_list; ifa1; ifa1 = ifa1->ifa_next) {
+ rcu_read_lock();
+ in_dev_for_each_ifa_rcu(ifa1, in_dev) {
if (ifa1 == ifa) {
/* promotion, keep the IP */
gone = 0;
@@ -1246,6 +1254,7 @@ void fib_del_ifaddr(struct in_ifaddr *ifa, struct in_ifaddr *iprim)
}
}
}
+ rcu_read_unlock();
no_promotions:
if (!(ok & BRD_OK))
@@ -1415,6 +1424,7 @@ static int fib_netdev_event(struct notifier_block *this, unsigned long event, vo
struct netdev_notifier_info_ext *info_ext = ptr;
struct in_device *in_dev;
struct net *net = dev_net(dev);
+ struct in_ifaddr *ifa;
unsigned int flags;
if (event == NETDEV_UNREGISTER) {
@@ -1429,9 +1439,9 @@ static int fib_netdev_event(struct notifier_block *this, unsigned long event, vo
switch (event) {
case NETDEV_UP:
- for_ifa(in_dev) {
+ in_dev_for_each_ifa_rtnl(ifa, in_dev) {
fib_add_ifaddr(ifa);
- } endfor_ifa(in_dev);
+ }
#ifdef CONFIG_IP_ROUTE_MULTIPATH
fib_sync_up(dev, RTNH_F_DEAD);
#endif
diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c
index 6c2febc39dca..719bd8e4eea4 100644
--- a/net/ipv4/igmp.c
+++ b/net/ipv4/igmp.c
@@ -325,14 +325,15 @@ static __be32 igmpv3_get_srcaddr(struct net_device *dev,
const struct flowi4 *fl4)
{
struct in_device *in_dev = __in_dev_get_rcu(dev);
+ const struct in_ifaddr *ifa;
if (!in_dev)
return htonl(INADDR_ANY);
- for_ifa(in_dev) {
+ in_dev_for_each_ifa_rcu(ifa, in_dev) {
if (fl4->saddr == ifa->ifa_local)
return fl4->saddr;
- } endfor_ifa(in_dev);
+ }
return htonl(INADDR_ANY);
}
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 683613e7355b..40b154d45ab4 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -3127,11 +3127,9 @@ static void sit_add_v4_addrs(struct inet6_dev *idev)
struct in_device *in_dev = __in_dev_get_rtnl(dev);
if (in_dev && (dev->flags & IFF_UP)) {
struct in_ifaddr *ifa;
-
int flag = scope;
- for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
-
+ in_dev_for_each_ifa_rtnl(ifa, in_dev) {
addr.s6_addr32[3] = ifa->ifa_local;
if (ifa->ifa_scope == RT_SCOPE_LINK)
diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c
index f0631bf486b6..e29cf27cb633 100644
--- a/net/sctp/protocol.c
+++ b/net/sctp/protocol.c
@@ -96,7 +96,7 @@ static void sctp_v4_copy_addrlist(struct list_head *addrlist,
return;
}
- for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
+ in_dev_for_each_ifa_rcu(ifa, in_dev) {
/* Add the address to the local list. */
addr = kzalloc(sizeof(*addr), GFP_ATOMIC);
if (addr) {
diff --git a/net/smc/smc_clc.c b/net/smc/smc_clc.c
index 745afd82f281..49bcebff6378 100644
--- a/net/smc/smc_clc.c
+++ b/net/smc/smc_clc.c
@@ -97,17 +97,19 @@ static int smc_clc_prfx_set4_rcu(struct dst_entry *dst, __be32 ipv4,
struct smc_clc_msg_proposal_prefix *prop)
{
struct in_device *in_dev = __in_dev_get_rcu(dst->dev);
+ const struct in_ifaddr *ifa;
if (!in_dev)
return -ENODEV;
- for_ifa(in_dev) {
+
+ in_dev_for_each_ifa_rcu(ifa, in_dev) {
if (!inet_ifa_match(ipv4, ifa))
continue;
prop->prefix_len = inet_mask_len(ifa->ifa_mask);
prop->outgoing_subnet = ifa->ifa_address & ifa->ifa_mask;
/* prop->ipv6_prefixes_cnt = 0; already done by memset before */
return 0;
- } endfor_ifa(in_dev);
+ }
return -ENOENT;
}
@@ -190,14 +192,15 @@ static int smc_clc_prfx_match4_rcu(struct net_device *dev,
struct smc_clc_msg_proposal_prefix *prop)
{
struct in_device *in_dev = __in_dev_get_rcu(dev);
+ const struct in_ifaddr *ifa;
if (!in_dev)
return -ENODEV;
- for_ifa(in_dev) {
+ in_dev_for_each_ifa_rcu(ifa, in_dev) {
if (prop->prefix_len == inet_mask_len(ifa->ifa_mask) &&
inet_ifa_match(prop->outgoing_subnet, ifa))
return 0;
- } endfor_ifa(in_dev);
+ }
return -ENOENT;
}
--
2.21.0
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