From 9f9354b92defa15aa0e215946c6e2dbccecb6aa7 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Wed, 4 Nov 2009 22:05:10 -0800 Subject: [PATCH] net: net/ipv4/devinet.c cleanups As pointed by Stephen Rothwell, commit c6d14c84 added a warning : net/ipv4/devinet.c: In function 'inet_select_addr': net/ipv4/devinet.c:902: warning: label 'out' defined but not used delete unused 'out' label and do some cleanups as well Reported-by: Stephen Rothwell Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller --- net/ipv4/devinet.c | 61 +++++++++++++++++++++++++--------------------- 1 file changed, 33 insertions(+), 28 deletions(-) diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c index 8aa7a134c1f1..c2045f9615da 100644 --- a/net/ipv4/devinet.c +++ b/net/ipv4/devinet.c @@ -140,11 +140,11 @@ void in_dev_finish_destroy(struct in_device *idev) #endif dev_put(dev); if (!idev->dead) - printk("Freeing alive in_device %p\n", idev); - else { + pr_err("Freeing alive in_device %p\n", idev); + else kfree(idev); - } } +EXPORT_SYMBOL(in_dev_finish_destroy); static struct in_device *inetdev_init(struct net_device *dev) { @@ -159,7 +159,8 @@ static struct in_device *inetdev_init(struct net_device *dev) sizeof(in_dev->cnf)); in_dev->cnf.sysctl = NULL; in_dev->dev = dev; - if ((in_dev->arp_parms = neigh_parms_alloc(dev, &arp_tbl)) == NULL) + in_dev->arp_parms = neigh_parms_alloc(dev, &arp_tbl); + if (!in_dev->arp_parms) goto out_kfree; if (IPV4_DEVCONF(in_dev->cnf, FORWARDING)) dev_disable_lro(dev); @@ -413,6 +414,7 @@ struct in_device *inetdev_by_index(struct net *net, int ifindex) rcu_read_unlock(); return in_dev; } +EXPORT_SYMBOL(inetdev_by_index); /* Called only from RTNL semaphored context. No locks. */ @@ -558,7 +560,7 @@ static int inet_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg * Determine a default network mask, based on the IP address. */ -static __inline__ int inet_abc_len(__be32 addr) +static inline int inet_abc_len(__be32 addr) { int rc = -1; /* Something else, probably a multicast. */ @@ -647,13 +649,15 @@ int devinet_ioctl(struct net *net, unsigned int cmd, void __user *arg) rtnl_lock(); ret = -ENODEV; - if ((dev = __dev_get_by_name(net, ifr.ifr_name)) == NULL) + dev = __dev_get_by_name(net, ifr.ifr_name); + if (!dev) goto done; if (colon) *colon = ':'; - if ((in_dev = __in_dev_get_rtnl(dev)) != NULL) { + in_dev = __in_dev_get_rtnl(dev); + if (in_dev) { if (tryaddrmatch) { /* Matthias Andree */ /* compare label and address (4.4BSD style) */ @@ -721,7 +725,8 @@ int devinet_ioctl(struct net *net, unsigned int cmd, void __user *arg) if (!ifa) { ret = -ENOBUFS; - if ((ifa = inet_alloc_ifa()) == NULL) + ifa = inet_alloc_ifa(); + if (!ifa) break; if (colon) memcpy(ifa->ifa_label, ifr.ifr_name, IFNAMSIZ); @@ -823,10 +828,10 @@ static int inet_gifconf(struct net_device *dev, char __user *buf, int len) struct ifreq ifr; int done = 0; - if (!in_dev || (ifa = in_dev->ifa_list) == NULL) + if (!in_dev) goto out; - for (; ifa; ifa = ifa->ifa_next) { + for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { if (!buf) { done += sizeof(ifr); continue; @@ -877,16 +882,17 @@ __be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope) addr = ifa->ifa_local; } endfor_ifa(in_dev); -no_in_dev: if (addr) goto out_unlock; +no_in_dev: /* Not loopback addresses on loopback should be preferred in this case. It is importnat that lo is the first interface in dev_base list. */ for_each_netdev_rcu(net, dev) { - if ((in_dev = __in_dev_get_rcu(dev)) == NULL) + in_dev = __in_dev_get_rcu(dev); + if (!in_dev) continue; for_primary_ifa(in_dev) { @@ -899,9 +905,9 @@ __be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope) } out_unlock: rcu_read_unlock(); -out: return addr; } +EXPORT_SYMBOL(inet_select_addr); static __be32 confirm_addr_indev(struct in_device *in_dev, __be32 dst, __be32 local, int scope) @@ -937,7 +943,7 @@ static __be32 confirm_addr_indev(struct in_device *in_dev, __be32 dst, } } endfor_ifa(in_dev); - return same? addr : 0; + return same ? addr : 0; } /* @@ -960,7 +966,8 @@ __be32 inet_confirm_addr(struct in_device *in_dev, net = dev_net(in_dev->dev); rcu_read_lock(); for_each_netdev_rcu(net, dev) { - if ((in_dev = __in_dev_get_rcu(dev))) { + in_dev = __in_dev_get_rcu(dev); + if (in_dev) { addr = confirm_addr_indev(in_dev, dst, local, scope); if (addr) break; @@ -979,14 +986,16 @@ int register_inetaddr_notifier(struct notifier_block *nb) { return blocking_notifier_chain_register(&inetaddr_chain, nb); } +EXPORT_SYMBOL(register_inetaddr_notifier); int unregister_inetaddr_notifier(struct notifier_block *nb) { return blocking_notifier_chain_unregister(&inetaddr_chain, nb); } +EXPORT_SYMBOL(unregister_inetaddr_notifier); -/* Rename ifa_labels for a device name change. Make some effort to preserve existing - * alias numbering and to create unique labels if possible. +/* Rename ifa_labels for a device name change. Make some effort to preserve + * existing alias numbering and to create unique labels if possible. */ static void inetdev_changename(struct net_device *dev, struct in_device *in_dev) { @@ -1005,11 +1014,10 @@ static void inetdev_changename(struct net_device *dev, struct in_device *in_dev) sprintf(old, ":%d", named); dot = old; } - if (strlen(dot) + strlen(dev->name) < IFNAMSIZ) { + if (strlen(dot) + strlen(dev->name) < IFNAMSIZ) strcat(ifa->ifa_label, dot); - } else { + else strcpy(ifa->ifa_label + (IFNAMSIZ - strlen(dot) - 1), dot); - } skip: rtmsg_ifa(RTM_NEWADDR, ifa, NULL, 0); } @@ -1056,8 +1064,9 @@ static int inetdev_event(struct notifier_block *this, unsigned long event, if (!inetdev_valid_mtu(dev->mtu)) break; if (dev->flags & IFF_LOOPBACK) { - struct in_ifaddr *ifa; - if ((ifa = inet_alloc_ifa()) != NULL) { + struct in_ifaddr *ifa = inet_alloc_ifa(); + + if (ifa) { ifa->ifa_local = ifa->ifa_address = htonl(INADDR_LOOPBACK); ifa->ifa_prefixlen = 8; @@ -1178,7 +1187,8 @@ static int inet_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) goto cont; if (idx > s_idx) s_ip_idx = 0; - if ((in_dev = __in_dev_get_rtnl(dev)) == NULL) + in_dev = __in_dev_get_rtnl(dev); + if (!in_dev) goto cont; for (ifa = in_dev->ifa_list, ip_idx = 0; ifa; @@ -1673,8 +1683,3 @@ void __init devinet_init(void) rtnl_register(PF_INET, RTM_GETADDR, NULL, inet_dump_ifaddr); } -EXPORT_SYMBOL(in_dev_finish_destroy); -EXPORT_SYMBOL(inet_select_addr); -EXPORT_SYMBOL(inetdev_by_index); -EXPORT_SYMBOL(register_inetaddr_notifier); -EXPORT_SYMBOL(unregister_inetaddr_notifier);