cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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inetdevice.h (9245B)


      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef _LINUX_INETDEVICE_H
      3#define _LINUX_INETDEVICE_H
      4
      5#ifdef __KERNEL__
      6
      7#include <linux/bitmap.h>
      8#include <linux/if.h>
      9#include <linux/ip.h>
     10#include <linux/netdevice.h>
     11#include <linux/rcupdate.h>
     12#include <linux/timer.h>
     13#include <linux/sysctl.h>
     14#include <linux/rtnetlink.h>
     15#include <linux/refcount.h>
     16
     17struct ipv4_devconf {
     18	void	*sysctl;
     19	int	data[IPV4_DEVCONF_MAX];
     20	DECLARE_BITMAP(state, IPV4_DEVCONF_MAX);
     21};
     22
     23#define MC_HASH_SZ_LOG 9
     24
     25struct in_device {
     26	struct net_device	*dev;
     27	netdevice_tracker	dev_tracker;
     28
     29	refcount_t		refcnt;
     30	int			dead;
     31	struct in_ifaddr	__rcu *ifa_list;/* IP ifaddr chain		*/
     32
     33	struct ip_mc_list __rcu	*mc_list;	/* IP multicast filter chain    */
     34	struct ip_mc_list __rcu	* __rcu *mc_hash;
     35
     36	int			mc_count;	/* Number of installed mcasts	*/
     37	spinlock_t		mc_tomb_lock;
     38	struct ip_mc_list	*mc_tomb;
     39	unsigned long		mr_v1_seen;
     40	unsigned long		mr_v2_seen;
     41	unsigned long		mr_maxdelay;
     42	unsigned long		mr_qi;		/* Query Interval */
     43	unsigned long		mr_qri;		/* Query Response Interval */
     44	unsigned char		mr_qrv;		/* Query Robustness Variable */
     45	unsigned char		mr_gq_running;
     46	u32			mr_ifc_count;
     47	struct timer_list	mr_gq_timer;	/* general query timer */
     48	struct timer_list	mr_ifc_timer;	/* interface change timer */
     49
     50	struct neigh_parms	*arp_parms;
     51	struct ipv4_devconf	cnf;
     52	struct rcu_head		rcu_head;
     53};
     54
     55#define IPV4_DEVCONF(cnf, attr) ((cnf).data[IPV4_DEVCONF_ ## attr - 1])
     56#define IPV4_DEVCONF_ALL(net, attr) \
     57	IPV4_DEVCONF((*(net)->ipv4.devconf_all), attr)
     58
     59static inline int ipv4_devconf_get(struct in_device *in_dev, int index)
     60{
     61	index--;
     62	return in_dev->cnf.data[index];
     63}
     64
     65static inline void ipv4_devconf_set(struct in_device *in_dev, int index,
     66				    int val)
     67{
     68	index--;
     69	set_bit(index, in_dev->cnf.state);
     70	in_dev->cnf.data[index] = val;
     71}
     72
     73static inline void ipv4_devconf_setall(struct in_device *in_dev)
     74{
     75	bitmap_fill(in_dev->cnf.state, IPV4_DEVCONF_MAX);
     76}
     77
     78#define IN_DEV_CONF_GET(in_dev, attr) \
     79	ipv4_devconf_get((in_dev), IPV4_DEVCONF_ ## attr)
     80#define IN_DEV_CONF_SET(in_dev, attr, val) \
     81	ipv4_devconf_set((in_dev), IPV4_DEVCONF_ ## attr, (val))
     82
     83#define IN_DEV_ANDCONF(in_dev, attr) \
     84	(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) && \
     85	 IN_DEV_CONF_GET((in_dev), attr))
     86
     87#define IN_DEV_NET_ORCONF(in_dev, net, attr) \
     88	(IPV4_DEVCONF_ALL(net, attr) || \
     89	 IN_DEV_CONF_GET((in_dev), attr))
     90
     91#define IN_DEV_ORCONF(in_dev, attr) \
     92	IN_DEV_NET_ORCONF(in_dev, dev_net(in_dev->dev), attr)
     93
     94#define IN_DEV_MAXCONF(in_dev, attr) \
     95	(max(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr), \
     96	     IN_DEV_CONF_GET((in_dev), attr)))
     97
     98#define IN_DEV_FORWARD(in_dev)		IN_DEV_CONF_GET((in_dev), FORWARDING)
     99#define IN_DEV_MFORWARD(in_dev)		IN_DEV_ANDCONF((in_dev), MC_FORWARDING)
    100#define IN_DEV_BFORWARD(in_dev)		IN_DEV_ANDCONF((in_dev), BC_FORWARDING)
    101#define IN_DEV_RPFILTER(in_dev)		IN_DEV_MAXCONF((in_dev), RP_FILTER)
    102#define IN_DEV_SRC_VMARK(in_dev)    	IN_DEV_ORCONF((in_dev), SRC_VMARK)
    103#define IN_DEV_SOURCE_ROUTE(in_dev)	IN_DEV_ANDCONF((in_dev), \
    104						       ACCEPT_SOURCE_ROUTE)
    105#define IN_DEV_ACCEPT_LOCAL(in_dev)	IN_DEV_ORCONF((in_dev), ACCEPT_LOCAL)
    106#define IN_DEV_BOOTP_RELAY(in_dev)	IN_DEV_ANDCONF((in_dev), BOOTP_RELAY)
    107
    108#define IN_DEV_LOG_MARTIANS(in_dev)	IN_DEV_ORCONF((in_dev), LOG_MARTIANS)
    109#define IN_DEV_PROXY_ARP(in_dev)	IN_DEV_ORCONF((in_dev), PROXY_ARP)
    110#define IN_DEV_PROXY_ARP_PVLAN(in_dev)	IN_DEV_ORCONF((in_dev), PROXY_ARP_PVLAN)
    111#define IN_DEV_SHARED_MEDIA(in_dev)	IN_DEV_ORCONF((in_dev), SHARED_MEDIA)
    112#define IN_DEV_TX_REDIRECTS(in_dev)	IN_DEV_ORCONF((in_dev), SEND_REDIRECTS)
    113#define IN_DEV_SEC_REDIRECTS(in_dev)	IN_DEV_ORCONF((in_dev), \
    114						      SECURE_REDIRECTS)
    115#define IN_DEV_IDTAG(in_dev)		IN_DEV_CONF_GET(in_dev, TAG)
    116#define IN_DEV_MEDIUM_ID(in_dev)	IN_DEV_CONF_GET(in_dev, MEDIUM_ID)
    117#define IN_DEV_PROMOTE_SECONDARIES(in_dev) \
    118					IN_DEV_ORCONF((in_dev), \
    119						      PROMOTE_SECONDARIES)
    120#define IN_DEV_ROUTE_LOCALNET(in_dev)	IN_DEV_ORCONF(in_dev, ROUTE_LOCALNET)
    121#define IN_DEV_NET_ROUTE_LOCALNET(in_dev, net)	\
    122	IN_DEV_NET_ORCONF(in_dev, net, ROUTE_LOCALNET)
    123
    124#define IN_DEV_RX_REDIRECTS(in_dev) \
    125	((IN_DEV_FORWARD(in_dev) && \
    126	  IN_DEV_ANDCONF((in_dev), ACCEPT_REDIRECTS)) \
    127	 || (!IN_DEV_FORWARD(in_dev) && \
    128	  IN_DEV_ORCONF((in_dev), ACCEPT_REDIRECTS)))
    129
    130#define IN_DEV_IGNORE_ROUTES_WITH_LINKDOWN(in_dev) \
    131	IN_DEV_ORCONF((in_dev), IGNORE_ROUTES_WITH_LINKDOWN)
    132
    133#define IN_DEV_ARPFILTER(in_dev)	IN_DEV_ORCONF((in_dev), ARPFILTER)
    134#define IN_DEV_ARP_ACCEPT(in_dev)	IN_DEV_ORCONF((in_dev), ARP_ACCEPT)
    135#define IN_DEV_ARP_ANNOUNCE(in_dev)	IN_DEV_MAXCONF((in_dev), ARP_ANNOUNCE)
    136#define IN_DEV_ARP_IGNORE(in_dev)	IN_DEV_MAXCONF((in_dev), ARP_IGNORE)
    137#define IN_DEV_ARP_NOTIFY(in_dev)	IN_DEV_MAXCONF((in_dev), ARP_NOTIFY)
    138#define IN_DEV_ARP_EVICT_NOCARRIER(in_dev) IN_DEV_ANDCONF((in_dev), \
    139							  ARP_EVICT_NOCARRIER)
    140
    141struct in_ifaddr {
    142	struct hlist_node	hash;
    143	struct in_ifaddr	__rcu *ifa_next;
    144	struct in_device	*ifa_dev;
    145	struct rcu_head		rcu_head;
    146	__be32			ifa_local;
    147	__be32			ifa_address;
    148	__be32			ifa_mask;
    149	__u32			ifa_rt_priority;
    150	__be32			ifa_broadcast;
    151	unsigned char		ifa_scope;
    152	unsigned char		ifa_prefixlen;
    153	unsigned char		ifa_proto;
    154	__u32			ifa_flags;
    155	char			ifa_label[IFNAMSIZ];
    156
    157	/* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */
    158	__u32			ifa_valid_lft;
    159	__u32			ifa_preferred_lft;
    160	unsigned long		ifa_cstamp; /* created timestamp */
    161	unsigned long		ifa_tstamp; /* updated timestamp */
    162};
    163
    164struct in_validator_info {
    165	__be32			ivi_addr;
    166	struct in_device	*ivi_dev;
    167	struct netlink_ext_ack	*extack;
    168};
    169
    170int register_inetaddr_notifier(struct notifier_block *nb);
    171int unregister_inetaddr_notifier(struct notifier_block *nb);
    172int register_inetaddr_validator_notifier(struct notifier_block *nb);
    173int unregister_inetaddr_validator_notifier(struct notifier_block *nb);
    174
    175void inet_netconf_notify_devconf(struct net *net, int event, int type,
    176				 int ifindex, struct ipv4_devconf *devconf);
    177
    178struct net_device *__ip_dev_find(struct net *net, __be32 addr, bool devref);
    179static inline struct net_device *ip_dev_find(struct net *net, __be32 addr)
    180{
    181	return __ip_dev_find(net, addr, true);
    182}
    183
    184int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b);
    185int devinet_ioctl(struct net *net, unsigned int cmd, struct ifreq *);
    186#ifdef CONFIG_INET
    187int inet_gifconf(struct net_device *dev, char __user *buf, int len, int size);
    188#else
    189static inline int inet_gifconf(struct net_device *dev, char __user *buf,
    190			       int len, int size)
    191{
    192	return 0;
    193}
    194#endif
    195void devinet_init(void);
    196struct in_device *inetdev_by_index(struct net *, int);
    197__be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope);
    198__be32 inet_confirm_addr(struct net *net, struct in_device *in_dev, __be32 dst,
    199			 __be32 local, int scope);
    200struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix,
    201				    __be32 mask);
    202struct in_ifaddr *inet_lookup_ifaddr_rcu(struct net *net, __be32 addr);
    203static inline bool inet_ifa_match(__be32 addr, const struct in_ifaddr *ifa)
    204{
    205	return !((addr^ifa->ifa_address)&ifa->ifa_mask);
    206}
    207
    208/*
    209 *	Check if a mask is acceptable.
    210 */
    211 
    212static __inline__ bool bad_mask(__be32 mask, __be32 addr)
    213{
    214	__u32 hmask;
    215	if (addr & (mask = ~mask))
    216		return true;
    217	hmask = ntohl(mask);
    218	if (hmask & (hmask+1))
    219		return true;
    220	return false;
    221}
    222
    223#define in_dev_for_each_ifa_rtnl(ifa, in_dev)			\
    224	for (ifa = rtnl_dereference((in_dev)->ifa_list); ifa;	\
    225	     ifa = rtnl_dereference(ifa->ifa_next))
    226
    227#define in_dev_for_each_ifa_rcu(ifa, in_dev)			\
    228	for (ifa = rcu_dereference((in_dev)->ifa_list); ifa;	\
    229	     ifa = rcu_dereference(ifa->ifa_next))
    230
    231static inline struct in_device *__in_dev_get_rcu(const struct net_device *dev)
    232{
    233	return rcu_dereference(dev->ip_ptr);
    234}
    235
    236static inline struct in_device *in_dev_get(const struct net_device *dev)
    237{
    238	struct in_device *in_dev;
    239
    240	rcu_read_lock();
    241	in_dev = __in_dev_get_rcu(dev);
    242	if (in_dev)
    243		refcount_inc(&in_dev->refcnt);
    244	rcu_read_unlock();
    245	return in_dev;
    246}
    247
    248static inline struct in_device *__in_dev_get_rtnl(const struct net_device *dev)
    249{
    250	return rtnl_dereference(dev->ip_ptr);
    251}
    252
    253/* called with rcu_read_lock or rtnl held */
    254static inline bool ip_ignore_linkdown(const struct net_device *dev)
    255{
    256	struct in_device *in_dev;
    257	bool rc = false;
    258
    259	in_dev = rcu_dereference_rtnl(dev->ip_ptr);
    260	if (in_dev &&
    261	    IN_DEV_IGNORE_ROUTES_WITH_LINKDOWN(in_dev))
    262		rc = true;
    263
    264	return rc;
    265}
    266
    267static inline struct neigh_parms *__in_dev_arp_parms_get_rcu(const struct net_device *dev)
    268{
    269	struct in_device *in_dev = __in_dev_get_rcu(dev);
    270
    271	return in_dev ? in_dev->arp_parms : NULL;
    272}
    273
    274void in_dev_finish_destroy(struct in_device *idev);
    275
    276static inline void in_dev_put(struct in_device *idev)
    277{
    278	if (refcount_dec_and_test(&idev->refcnt))
    279		in_dev_finish_destroy(idev);
    280}
    281
    282#define __in_dev_put(idev)  refcount_dec(&(idev)->refcnt)
    283#define in_dev_hold(idev)   refcount_inc(&(idev)->refcnt)
    284
    285#endif /* __KERNEL__ */
    286
    287static __inline__ __be32 inet_make_mask(int logmask)
    288{
    289	if (logmask)
    290		return htonl(~((1U<<(32-logmask))-1));
    291	return 0;
    292}
    293
    294static __inline__ int inet_mask_len(__be32 mask)
    295{
    296	__u32 hmask = ntohl(mask);
    297	if (!hmask)
    298		return 0;
    299	return 32 - ffz(~hmask);
    300}
    301
    302
    303#endif /* _LINUX_INETDEVICE_H */