71e27da961
Previously inet devices were only constructed when addresses are added (or rarely in ipmr). Therefore the default config values they get are the ones at the time of these operations. Now that we're creating inet devices earlier, this changes the behaviour of default config values in an incompatible way (see bug #8519). This patch creates a compromise by setting the default values at the same point as before but only for those that have not been explicitly set by the user since the inet device's creation. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
225 lines
6.3 KiB
C
225 lines
6.3 KiB
C
#ifndef _LINUX_INETDEVICE_H
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#define _LINUX_INETDEVICE_H
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#ifdef __KERNEL__
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#include <linux/bitmap.h>
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#include <linux/if.h>
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#include <linux/netdevice.h>
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#include <linux/rcupdate.h>
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#include <linux/timer.h>
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struct ipv4_devconf
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{
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void *sysctl;
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int data[__NET_IPV4_CONF_MAX - 1];
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DECLARE_BITMAP(state, __NET_IPV4_CONF_MAX - 1);
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};
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extern struct ipv4_devconf ipv4_devconf;
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struct in_device
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{
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struct net_device *dev;
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atomic_t refcnt;
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int dead;
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struct in_ifaddr *ifa_list; /* IP ifaddr chain */
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rwlock_t mc_list_lock;
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struct ip_mc_list *mc_list; /* IP multicast filter chain */
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spinlock_t mc_tomb_lock;
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struct ip_mc_list *mc_tomb;
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unsigned long mr_v1_seen;
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unsigned long mr_v2_seen;
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unsigned long mr_maxdelay;
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unsigned char mr_qrv;
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unsigned char mr_gq_running;
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unsigned char mr_ifc_count;
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struct timer_list mr_gq_timer; /* general query timer */
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struct timer_list mr_ifc_timer; /* interface change timer */
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struct neigh_parms *arp_parms;
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struct ipv4_devconf cnf;
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struct rcu_head rcu_head;
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};
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#define IPV4_DEVCONF(cnf, attr) ((cnf).data[NET_IPV4_CONF_ ## attr - 1])
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#define IPV4_DEVCONF_ALL(attr) IPV4_DEVCONF(ipv4_devconf, attr)
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static inline int ipv4_devconf_get(struct in_device *in_dev, int index)
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{
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index--;
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return in_dev->cnf.data[index];
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}
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static inline void ipv4_devconf_set(struct in_device *in_dev, int index,
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int val)
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{
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index--;
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set_bit(index, in_dev->cnf.state);
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in_dev->cnf.data[index] = val;
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}
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static inline void ipv4_devconf_setall(struct in_device *in_dev)
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{
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bitmap_fill(in_dev->cnf.state, __NET_IPV4_CONF_MAX - 1);
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}
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#define IN_DEV_CONF_GET(in_dev, attr) \
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ipv4_devconf_get((in_dev), NET_IPV4_CONF_ ## attr)
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#define IN_DEV_CONF_SET(in_dev, attr, val) \
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ipv4_devconf_set((in_dev), NET_IPV4_CONF_ ## attr, (val))
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#define IN_DEV_ANDCONF(in_dev, attr) \
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(IPV4_DEVCONF_ALL(attr) && IN_DEV_CONF_GET((in_dev), attr))
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#define IN_DEV_ORCONF(in_dev, attr) \
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(IPV4_DEVCONF_ALL(attr) || IN_DEV_CONF_GET((in_dev), attr))
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#define IN_DEV_MAXCONF(in_dev, attr) \
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(max(IPV4_DEVCONF_ALL(attr), IN_DEV_CONF_GET((in_dev), attr)))
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#define IN_DEV_FORWARD(in_dev) IN_DEV_CONF_GET((in_dev), FORWARDING)
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#define IN_DEV_MFORWARD(in_dev) (IPV4_DEVCONF_ALL(MC_FORWARDING) && \
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IPV4_DEVCONF((in_dev)->cnf, \
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MC_FORWARDING))
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#define IN_DEV_RPFILTER(in_dev) IN_DEV_ANDCONF((in_dev), RP_FILTER)
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#define IN_DEV_SOURCE_ROUTE(in_dev) IN_DEV_ANDCONF((in_dev), \
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ACCEPT_SOURCE_ROUTE)
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#define IN_DEV_BOOTP_RELAY(in_dev) IN_DEV_ANDCONF((in_dev), BOOTP_RELAY)
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#define IN_DEV_LOG_MARTIANS(in_dev) IN_DEV_ORCONF((in_dev), LOG_MARTIANS)
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#define IN_DEV_PROXY_ARP(in_dev) IN_DEV_ORCONF((in_dev), PROXY_ARP)
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#define IN_DEV_SHARED_MEDIA(in_dev) IN_DEV_ORCONF((in_dev), SHARED_MEDIA)
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#define IN_DEV_TX_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), SEND_REDIRECTS)
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#define IN_DEV_SEC_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), \
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SECURE_REDIRECTS)
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#define IN_DEV_IDTAG(in_dev) IN_DEV_CONF_GET(in_dev, TAG)
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#define IN_DEV_MEDIUM_ID(in_dev) IN_DEV_CONF_GET(in_dev, MEDIUM_ID)
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#define IN_DEV_PROMOTE_SECONDARIES(in_dev) \
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IN_DEV_ORCONF((in_dev), \
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PROMOTE_SECONDARIES)
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#define IN_DEV_RX_REDIRECTS(in_dev) \
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((IN_DEV_FORWARD(in_dev) && \
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IN_DEV_ANDCONF((in_dev), ACCEPT_REDIRECTS)) \
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|| (!IN_DEV_FORWARD(in_dev) && \
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IN_DEV_ORCONF((in_dev), ACCEPT_REDIRECTS)))
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#define IN_DEV_ARPFILTER(in_dev) IN_DEV_ORCONF((in_dev), ARPFILTER)
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#define IN_DEV_ARP_ANNOUNCE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_ANNOUNCE)
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#define IN_DEV_ARP_IGNORE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_IGNORE)
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struct in_ifaddr
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{
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struct in_ifaddr *ifa_next;
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struct in_device *ifa_dev;
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struct rcu_head rcu_head;
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__be32 ifa_local;
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__be32 ifa_address;
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__be32 ifa_mask;
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__be32 ifa_broadcast;
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__be32 ifa_anycast;
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unsigned char ifa_scope;
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unsigned char ifa_flags;
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unsigned char ifa_prefixlen;
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char ifa_label[IFNAMSIZ];
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};
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extern int register_inetaddr_notifier(struct notifier_block *nb);
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extern int unregister_inetaddr_notifier(struct notifier_block *nb);
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extern struct net_device *ip_dev_find(__be32 addr);
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extern int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b);
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extern int devinet_ioctl(unsigned int cmd, void __user *);
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extern void devinet_init(void);
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extern struct in_device *inetdev_by_index(int);
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extern __be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope);
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extern __be32 inet_confirm_addr(const struct net_device *dev, __be32 dst, __be32 local, int scope);
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extern struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix, __be32 mask);
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extern void inet_forward_change(void);
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static __inline__ int inet_ifa_match(__be32 addr, struct in_ifaddr *ifa)
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{
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return !((addr^ifa->ifa_address)&ifa->ifa_mask);
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}
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/*
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* Check if a mask is acceptable.
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*/
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static __inline__ int bad_mask(__be32 mask, __be32 addr)
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{
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__u32 hmask;
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if (addr & (mask = ~mask))
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return 1;
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hmask = ntohl(mask);
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if (hmask & (hmask+1))
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return 1;
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return 0;
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}
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#define for_primary_ifa(in_dev) { struct in_ifaddr *ifa; \
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for (ifa = (in_dev)->ifa_list; ifa && !(ifa->ifa_flags&IFA_F_SECONDARY); ifa = ifa->ifa_next)
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#define for_ifa(in_dev) { struct in_ifaddr *ifa; \
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for (ifa = (in_dev)->ifa_list; ifa; ifa = ifa->ifa_next)
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#define endfor_ifa(in_dev) }
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static inline struct in_device *__in_dev_get_rcu(const struct net_device *dev)
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{
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struct in_device *in_dev = dev->ip_ptr;
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if (in_dev)
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in_dev = rcu_dereference(in_dev);
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return in_dev;
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}
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static __inline__ struct in_device *
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in_dev_get(const struct net_device *dev)
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{
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struct in_device *in_dev;
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rcu_read_lock();
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in_dev = __in_dev_get_rcu(dev);
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if (in_dev)
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atomic_inc(&in_dev->refcnt);
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rcu_read_unlock();
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return in_dev;
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}
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static __inline__ struct in_device *
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__in_dev_get_rtnl(const struct net_device *dev)
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{
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return (struct in_device*)dev->ip_ptr;
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}
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extern void in_dev_finish_destroy(struct in_device *idev);
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static inline void in_dev_put(struct in_device *idev)
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{
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if (atomic_dec_and_test(&idev->refcnt))
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in_dev_finish_destroy(idev);
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}
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#define __in_dev_put(idev) atomic_dec(&(idev)->refcnt)
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#define in_dev_hold(idev) atomic_inc(&(idev)->refcnt)
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#endif /* __KERNEL__ */
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static __inline__ __be32 inet_make_mask(int logmask)
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{
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if (logmask)
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return htonl(~((1<<(32-logmask))-1));
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return 0;
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}
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static __inline__ int inet_mask_len(__be32 mask)
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{
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__u32 hmask = ntohl(mask);
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if (!hmask)
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return 0;
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return 32 - ffz(~hmask);
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}
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#endif /* _LINUX_INETDEVICE_H */
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