From cd5a411dbaeb9fd70e2a8241a74b6f52a1a572ca Mon Sep 17 00:00:00 2001 From: Florian Westphal Date: Fri, 31 May 2019 18:27:07 +0200 Subject: 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 t di# Last commands done (6 commands done): Signed-off-by: David S. Miller --- 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(-) (limited to 'net') 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 eb03153dfe12..fa5732bcfc76 100644 --- a/net/ipv4/igmp.c +++ b/net/ipv4/igmp.c @@ -336,14 +336,15 @@ 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 6b673d4f5ca9..4c30726fa7c7 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 23af232c0a25..2d47adcb4cbe 100644 --- a/net/sctp/protocol.c +++ b/net/sctp/protocol.c @@ -81,7 +81,7 @@ 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; } -- cgit v1.2.3