[linux-block.git] / include / linux / mroute_base.h

#ifndef __LINUX_MROUTE_BASE_H
#define __LINUX_MROUTE_BASE_H

#include <linux/netdevice.h>
#include <linux/rhashtable-types.h>
#include <linux/spinlock.h>
#include <net/net_namespace.h>
#include <net/sock.h>
#include <net/fib_notifier.h>

/**
 * struct vif_device - interface representor for multicast routing
 * @dev: network device being used
 * @bytes_in: statistic; bytes ingressing
 * @bytes_out: statistic; bytes egresing
 * @pkt_in: statistic; packets ingressing
 * @pkt_out: statistic; packets egressing
 * @rate_limit: Traffic shaping (NI)
 * @threshold: TTL threshold
 * @flags: Control flags
 * @link: Physical interface index
 * @dev_parent_id: device parent id
 * @local: Local address
 * @remote: Remote address for tunnels
 */
struct vif_device {
	struct net_device *dev;
	unsigned long bytes_in, bytes_out;
	unsigned long pkt_in, pkt_out;
	unsigned long rate_limit;
	unsigned char threshold;
	unsigned short flags;
	int link;

	/* Currently only used by ipmr */
	struct netdev_phys_item_id dev_parent_id;
	__be32 local, remote;
};

struct vif_entry_notifier_info {
	struct fib_notifier_info info;
	struct net_device *dev;
	unsigned short vif_index;
	unsigned short vif_flags;
	u32 tb_id;
};

static inline int mr_call_vif_notifier(struct notifier_block *nb,
				       struct net *net,
				       unsigned short family,
				       enum fib_event_type event_type,
				       struct vif_device *vif,
				       unsigned short vif_index, u32 tb_id)
{
	struct vif_entry_notifier_info info = {
		.info = {
			.family = family,
			.net = net,
		},
		.dev = vif->dev,
		.vif_index = vif_index,
		.vif_flags = vif->flags,
		.tb_id = tb_id,
	};

	return call_fib_notifier(nb, net, event_type, &info.info);
}

static inline int mr_call_vif_notifiers(struct net *net,
					unsigned short family,
					enum fib_event_type event_type,
					struct vif_device *vif,
					unsigned short vif_index, u32 tb_id,
					unsigned int *ipmr_seq)
{
	struct vif_entry_notifier_info info = {
		.info = {
			.family = family,
			.net = net,
		},
		.dev = vif->dev,
		.vif_index = vif_index,
		.vif_flags = vif->flags,
		.tb_id = tb_id,
	};

	ASSERT_RTNL();
	(*ipmr_seq)++;
	return call_fib_notifiers(net, event_type, &info.info);
}

#ifndef MAXVIFS
/* This one is nasty; value is defined in uapi using different symbols for
 * mroute and morute6 but both map into same 32.
 */
#define MAXVIFS	32
#endif

#define VIF_EXISTS(_mrt, _idx) (!!((_mrt)->vif_table[_idx].dev))

/* mfc_flags:
 * MFC_STATIC - the entry was added statically (not by a routing daemon)
 * MFC_OFFLOAD - the entry was offloaded to the hardware
 */
enum {
	MFC_STATIC = BIT(0),
	MFC_OFFLOAD = BIT(1),
};

/**
 * struct mr_mfc - common multicast routing entries
 * @mnode: rhashtable list
 * @mfc_parent: source interface (iif)
 * @mfc_flags: entry flags
 * @expires: unresolved entry expire time
 * @unresolved: unresolved cached skbs
 * @last_assert: time of last assert
 * @minvif: minimum VIF id
 * @maxvif: maximum VIF id
 * @bytes: bytes that have passed for this entry
 * @pkt: packets that have passed for this entry
 * @wrong_if: number of wrong source interface hits
 * @lastuse: time of last use of the group (traffic or update)
 * @ttls: OIF TTL threshold array
 * @refcount: reference count for this entry
 * @list: global entry list
 * @rcu: used for entry destruction
 * @free: Operation used for freeing an entry under RCU
 */
struct mr_mfc {
	struct rhlist_head mnode;
	unsigned short mfc_parent;
	int mfc_flags;

	union {
		struct {
			unsigned long expires;
			struct sk_buff_head unresolved;
		} unres;
		struct {
			unsigned long last_assert;
			int minvif;
			int maxvif;
			unsigned long bytes;
			unsigned long pkt;
			unsigned long wrong_if;
			unsigned long lastuse;
			unsigned char ttls[MAXVIFS];
			refcount_t refcount;
		} res;
	} mfc_un;
	struct list_head list;
	struct rcu_head	rcu;
	void (*free)(struct rcu_head *head);
};

static inline void mr_cache_put(struct mr_mfc *c)
{
	if (refcount_dec_and_test(&c->mfc_un.res.refcount))
		call_rcu(&c->rcu, c->free);
}

static inline void mr_cache_hold(struct mr_mfc *c)
{
	refcount_inc(&c->mfc_un.res.refcount);
}

struct mfc_entry_notifier_info {
	struct fib_notifier_info info;
	struct mr_mfc *mfc;
	u32 tb_id;
};

static inline int mr_call_mfc_notifier(struct notifier_block *nb,
				       struct net *net,
				       unsigned short family,
				       enum fib_event_type event_type,
				       struct mr_mfc *mfc, u32 tb_id)
{
	struct mfc_entry_notifier_info info = {
		.info = {
			.family = family,
			.net = net,
		},
		.mfc = mfc,
		.tb_id = tb_id
	};

	return call_fib_notifier(nb, net, event_type, &info.info);
}

static inline int mr_call_mfc_notifiers(struct net *net,
					unsigned short family,
					enum fib_event_type event_type,
					struct mr_mfc *mfc, u32 tb_id,
					unsigned int *ipmr_seq)
{
	struct mfc_entry_notifier_info info = {
		.info = {
			.family = family,
			.net = net,
		},
		.mfc = mfc,
		.tb_id = tb_id
	};

	ASSERT_RTNL();
	(*ipmr_seq)++;
	return call_fib_notifiers(net, event_type, &info.info);
}

struct mr_table;

/**
 * struct mr_table_ops - callbacks and info for protocol-specific ops
 * @rht_params: parameters for accessing the MFC hash
 * @cmparg_any: a hash key to be used for matching on (*,*) routes
 */
struct mr_table_ops {
	const struct rhashtable_params *rht_params;
	void *cmparg_any;
};

/**
 * struct mr_table - a multicast routing table
 * @list: entry within a list of multicast routing tables
 * @net: net where this table belongs
 * @ops: protocol specific operations
 * @id: identifier of the table
 * @mroute_sk: socket associated with the table
 * @ipmr_expire_timer: timer for handling unresolved routes
 * @mfc_unres_queue: list of unresolved MFC entries
 * @vif_table: array containing all possible vifs
 * @mfc_hash: Hash table of all resolved routes for easy lookup
 * @mfc_cache_list: list of resovled routes for possible traversal
 * @maxvif: Identifier of highest value vif currently in use
 * @cache_resolve_queue_len: current size of unresolved queue
 * @mroute_do_assert: Whether to inform userspace on wrong ingress
 * @mroute_do_pim: Whether to receive IGMP PIMv1
 * @mroute_reg_vif_num: PIM-device vif index
 */
struct mr_table {
	struct list_head	list;
	possible_net_t		net;
	struct mr_table_ops	ops;
	u32			id;
	struct sock __rcu	*mroute_sk;
	struct timer_list	ipmr_expire_timer;
	struct list_head	mfc_unres_queue;
	struct vif_device	vif_table[MAXVIFS];
	struct rhltable		mfc_hash;
	struct list_head	mfc_cache_list;
	int			maxvif;
	atomic_t		cache_resolve_queue_len;
	bool			mroute_do_assert;
	bool			mroute_do_pim;
	bool			mroute_do_wrvifwhole;
	int			mroute_reg_vif_num;
};

#ifdef CONFIG_IP_MROUTE_COMMON
void vif_device_init(struct vif_device *v,
		     struct net_device *dev,
		     unsigned long rate_limit,
		     unsigned char threshold,
		     unsigned short flags,
		     unsigned short get_iflink_mask);

struct mr_table *
mr_table_alloc(struct net *net, u32 id,
	       struct mr_table_ops *ops,
	       void (*expire_func)(struct timer_list *t),
	       void (*table_set)(struct mr_table *mrt,
				 struct net *net));

/* These actually return 'struct mr_mfc *', but to avoid need for explicit
 * castings they simply return void.
 */
void *mr_mfc_find_parent(struct mr_table *mrt,
			 void *hasharg, int parent);
void *mr_mfc_find_any_parent(struct mr_table *mrt, int vifi);
void *mr_mfc_find_any(struct mr_table *mrt, int vifi, void *hasharg);

int mr_fill_mroute(struct mr_table *mrt, struct sk_buff *skb,
		   struct mr_mfc *c, struct rtmsg *rtm);
int mr_rtm_dumproute(struct sk_buff *skb, struct netlink_callback *cb,
		     struct mr_table *(*iter)(struct net *net,
					      struct mr_table *mrt),
		     int (*fill)(struct mr_table *mrt,
				 struct sk_buff *skb,
				 u32 portid, u32 seq, struct mr_mfc *c,
				 int cmd, int flags),
		     spinlock_t *lock);

int mr_dump(struct net *net, struct notifier_block *nb, unsigned short family,
	    int (*rules_dump)(struct net *net,
			      struct notifier_block *nb),
	    struct mr_table *(*mr_iter)(struct net *net,
					struct mr_table *mrt),
	    rwlock_t *mrt_lock);
#else
static inline void vif_device_init(struct vif_device *v,
				   struct net_device *dev,
				   unsigned long rate_limit,
				   unsigned char threshold,
				   unsigned short flags,
				   unsigned short get_iflink_mask)
{
}

static inline void *mr_mfc_find_parent(struct mr_table *mrt,
				       void *hasharg, int parent)
{
	return NULL;
}

static inline void *mr_mfc_find_any_parent(struct mr_table *mrt,
					   int vifi)
{
	return NULL;
}

static inline struct mr_mfc *mr_mfc_find_any(struct mr_table *mrt,
					     int vifi, void *hasharg)
{
	return NULL;
}

static inline int mr_fill_mroute(struct mr_table *mrt, struct sk_buff *skb,
				 struct mr_mfc *c, struct rtmsg *rtm)
{
	return -EINVAL;
}

static inline int
mr_rtm_dumproute(struct sk_buff *skb, struct netlink_callback *cb,
		 struct mr_table *(*iter)(struct net *net,
					  struct mr_table *mrt),
		 int (*fill)(struct mr_table *mrt,
			     struct sk_buff *skb,
			     u32 portid, u32 seq, struct mr_mfc *c,
			     int cmd, int flags),
		 spinlock_t *lock)
{
	return -EINVAL;
}

static inline int mr_dump(struct net *net, struct notifier_block *nb,
			  unsigned short family,
			  int (*rules_dump)(struct net *net,
					    struct notifier_block *nb),
			  struct mr_table *(*mr_iter)(struct net *net,
						      struct mr_table *mrt),
			  rwlock_t *mrt_lock)
{
	return -EINVAL;
}
#endif

static inline void *mr_mfc_find(struct mr_table *mrt, void *hasharg)
{
	return mr_mfc_find_parent(mrt, hasharg, -1);
}

#ifdef CONFIG_PROC_FS
struct mr_vif_iter {
	struct seq_net_private p;
	struct mr_table *mrt;
	int ct;
};

struct mr_mfc_iter {
	struct seq_net_private p;
	struct mr_table *mrt;
	struct list_head *cache;

	/* Lock protecting the mr_table's unresolved queue */
	spinlock_t *lock;
};

#ifdef CONFIG_IP_MROUTE_COMMON
void *mr_vif_seq_idx(struct net *net, struct mr_vif_iter *iter, loff_t pos);
void *mr_vif_seq_next(struct seq_file *seq, void *v, loff_t *pos);

static inline void *mr_vif_seq_start(struct seq_file *seq, loff_t *pos)
{
	return *pos ? mr_vif_seq_idx(seq_file_net(seq),
				     seq->private, *pos - 1)
		    : SEQ_START_TOKEN;
}

/* These actually return 'struct mr_mfc *', but to avoid need for explicit
 * castings they simply return void.
 */
void *mr_mfc_seq_idx(struct net *net,
		     struct mr_mfc_iter *it, loff_t pos);
void *mr_mfc_seq_next(struct seq_file *seq, void *v,
		      loff_t *pos);

static inline void *mr_mfc_seq_start(struct seq_file *seq, loff_t *pos,
				     struct mr_table *mrt, spinlock_t *lock)
{
	struct mr_mfc_iter *it = seq->private;

	it->mrt = mrt;
	it->cache = NULL;
	it->lock = lock;

	return *pos ? mr_mfc_seq_idx(seq_file_net(seq),
				     seq->private, *pos - 1)
		    : SEQ_START_TOKEN;
}

static inline void mr_mfc_seq_stop(struct seq_file *seq, void *v)
{
	struct mr_mfc_iter *it = seq->private;
	struct mr_table *mrt = it->mrt;

	if (it->cache == &mrt->mfc_unres_queue)
		spin_unlock_bh(it->lock);
	else if (it->cache == &mrt->mfc_cache_list)
		rcu_read_unlock();
}
#else
static inline void *mr_vif_seq_idx(struct net *net, struct mr_vif_iter *iter,
				   loff_t pos)
{
	return NULL;
}

static inline void *mr_vif_seq_next(struct seq_file *seq,
				    void *v, loff_t *pos)
{
	return NULL;
}

static inline void *mr_vif_seq_start(struct seq_file *seq, loff_t *pos)
{
	return NULL;
}

static inline void *mr_mfc_seq_idx(struct net *net,
				   struct mr_mfc_iter *it, loff_t pos)
{
	return NULL;
}

static inline void *mr_mfc_seq_next(struct seq_file *seq, void *v,
				    loff_t *pos)
{
	return NULL;
}

static inline void *mr_mfc_seq_start(struct seq_file *seq, loff_t *pos,
				     struct mr_table *mrt, spinlock_t *lock)
{
	return NULL;
}

static inline void mr_mfc_seq_stop(struct seq_file *seq, void *v)
{
}
#endif
#endif
#endif
Commit	Line	Data
6853f21f YM	1	#ifndef __LINUX_MROUTE_BASE_H
	2	#define __LINUX_MROUTE_BASE_H
	3
	4	#include <linux/netdevice.h>
0eb71a9d	5	#include <linux/rhashtable-types.h>
c8d61968	6	#include <linux/spinlock.h>
b70432f7 YM	7	#include <net/net_namespace.h>
b70432f7 YM	8	#include <net/sock.h>
bc67a0da	9	#include <net/fib_notifier.h>
6853f21f YM	10
	11	/**
	12	* struct vif_device - interface representor for multicast routing
	13	* @dev: network device being used
	14	* @bytes_in: statistic; bytes ingressing
	15	* @bytes_out: statistic; bytes egresing
	16	* @pkt_in: statistic; packets ingressing
	17	* @pkt_out: statistic; packets egressing
	18	* @rate_limit: Traffic shaping (NI)
	19	* @threshold: TTL threshold
	20	* @flags: Control flags
	21	* @link: Physical interface index
	22	* @dev_parent_id: device parent id
	23	* @local: Local address
	24	* @remote: Remote address for tunnels
	25	*/
	26	struct vif_device {
	27	struct net_device *dev;
	28	unsigned long bytes_in, bytes_out;
	29	unsigned long pkt_in, pkt_out;
	30	unsigned long rate_limit;
	31	unsigned char threshold;
	32	unsigned short flags;
	33	int link;
	34
	35	/* Currently only used by ipmr */
	36	struct netdev_phys_item_id dev_parent_id;
	37	__be32 local, remote;
	38	};
	39
bc67a0da YM	40	struct vif_entry_notifier_info {
	41	struct fib_notifier_info info;
	42	struct net_device *dev;
	43	unsigned short vif_index;
	44	unsigned short vif_flags;
	45	u32 tb_id;
	46	};
	47
	48	static inline int mr_call_vif_notifier(struct notifier_block *nb,
	49	struct net *net,
	50	unsigned short family,
	51	enum fib_event_type event_type,
	52	struct vif_device *vif,
	53	unsigned short vif_index, u32 tb_id)
	54	{
	55	struct vif_entry_notifier_info info = {
	56	.info = {
	57	.family = family,
	58	.net = net,
	59	},
	60	.dev = vif->dev,
	61	.vif_index = vif_index,
	62	.vif_flags = vif->flags,
	63	.tb_id = tb_id,
	64	};
	65
	66	return call_fib_notifier(nb, net, event_type, &info.info);
	67	}
	68
	69	static inline int mr_call_vif_notifiers(struct net *net,
	70	unsigned short family,
	71	enum fib_event_type event_type,
	72	struct vif_device *vif,
	73	unsigned short vif_index, u32 tb_id,
	74	unsigned int *ipmr_seq)
	75	{
	76	struct vif_entry_notifier_info info = {
	77	.info = {
	78	.family = family,
	79	.net = net,
	80	},
	81	.dev = vif->dev,
	82	.vif_index = vif_index,
	83	.vif_flags = vif->flags,
	84	.tb_id = tb_id,
	85	};
	86
	87	ASSERT_RTNL();
	88	(*ipmr_seq)++;
	89	return call_fib_notifiers(net, event_type, &info.info);
	90	}
	91
b70432f7 YM	92	#ifndef MAXVIFS
	93	/* This one is nasty; value is defined in uapi using different symbols for
	94	* mroute and morute6 but both map into same 32.
	95	*/
	96	#define MAXVIFS 32
	97	#endif
	98
	99	#define VIF_EXISTS(_mrt, _idx) (!!((_mrt)->vif_table[_idx].dev))
	100
889cd83c YM	101	/* mfc_flags:
	102	* MFC_STATIC - the entry was added statically (not by a routing daemon)
	103	* MFC_OFFLOAD - the entry was offloaded to the hardware
	104	*/
	105	enum {
	106	MFC_STATIC = BIT(0),
	107	MFC_OFFLOAD = BIT(1),
	108	};
	109
494fff56 YM	110	/**
	111	* struct mr_mfc - common multicast routing entries
	112	* @mnode: rhashtable list
	113	* @mfc_parent: source interface (iif)
	114	* @mfc_flags: entry flags
	115	* @expires: unresolved entry expire time
	116	* @unresolved: unresolved cached skbs
	117	* @last_assert: time of last assert
	118	* @minvif: minimum VIF id
	119	* @maxvif: maximum VIF id
	120	* @bytes: bytes that have passed for this entry
	121	* @pkt: packets that have passed for this entry
	122	* @wrong_if: number of wrong source interface hits
	123	* @lastuse: time of last use of the group (traffic or update)
	124	* @ttls: OIF TTL threshold array
	125	* @refcount: reference count for this entry
	126	* @list: global entry list
	127	* @rcu: used for entry destruction
8c13af2a	128	* @free: Operation used for freeing an entry under RCU
494fff56 YM	129	*/
	130	struct mr_mfc {
	131	struct rhlist_head mnode;
	132	unsigned short mfc_parent;
	133	int mfc_flags;
	134
	135	union {
	136	struct {
	137	unsigned long expires;
	138	struct sk_buff_head unresolved;
	139	} unres;
	140	struct {
	141	unsigned long last_assert;
	142	int minvif;
	143	int maxvif;
	144	unsigned long bytes;
	145	unsigned long pkt;
	146	unsigned long wrong_if;
	147	unsigned long lastuse;
	148	unsigned char ttls[MAXVIFS];
	149	refcount_t refcount;
	150	} res;
	151	} mfc_un;
	152	struct list_head list;
	153	struct rcu_head rcu;
8c13af2a	154	void (free)(struct rcu_head head);
494fff56 YM	155	};
494fff56 YM	156
8c13af2a YM	157	static inline void mr_cache_put(struct mr_mfc *c)
	158	{
	159	if (refcount_dec_and_test(&c->mfc_un.res.refcount))
	160	call_rcu(&c->rcu, c->free);
	161	}
	162
	163	static inline void mr_cache_hold(struct mr_mfc *c)
	164	{
	165	refcount_inc(&c->mfc_un.res.refcount);
	166	}
	167
54c4cad9 YM	168	struct mfc_entry_notifier_info {
	169	struct fib_notifier_info info;
	170	struct mr_mfc *mfc;
	171	u32 tb_id;
	172	};
	173
	174	static inline int mr_call_mfc_notifier(struct notifier_block *nb,
	175	struct net *net,
	176	unsigned short family,
	177	enum fib_event_type event_type,
	178	struct mr_mfc *mfc, u32 tb_id)
	179	{
	180	struct mfc_entry_notifier_info info = {
	181	.info = {
	182	.family = family,
	183	.net = net,
	184	},
	185	.mfc = mfc,
	186	.tb_id = tb_id
	187	};
	188
	189	return call_fib_notifier(nb, net, event_type, &info.info);
	190	}
	191
	192	static inline int mr_call_mfc_notifiers(struct net *net,
	193	unsigned short family,
	194	enum fib_event_type event_type,
	195	struct mr_mfc *mfc, u32 tb_id,
	196	unsigned int *ipmr_seq)
	197	{
	198	struct mfc_entry_notifier_info info = {
	199	.info = {
	200	.family = family,
	201	.net = net,
	202	},
	203	.mfc = mfc,
	204	.tb_id = tb_id
	205	};
	206
	207	ASSERT_RTNL();
	208	(*ipmr_seq)++;
	209	return call_fib_notifiers(net, event_type, &info.info);
	210	}
	211
845c9a7a YM	212	struct mr_table;
	213
	214	/**
	215	* struct mr_table_ops - callbacks and info for protocol-specific ops
	216	* @rht_params: parameters for accessing the MFC hash
	217	* @cmparg_any: a hash key to be used for matching on (,) routes
	218	*/
	219	struct mr_table_ops {
	220	const struct rhashtable_params *rht_params;
	221	void *cmparg_any;
	222	};
	223
b70432f7 YM	224	/**
	225	* struct mr_table - a multicast routing table
	226	* @list: entry within a list of multicast routing tables
	227	* @net: net where this table belongs
845c9a7a	228	* @ops: protocol specific operations
b70432f7 YM	229	* @id: identifier of the table
	230	* @mroute_sk: socket associated with the table
	231	* @ipmr_expire_timer: timer for handling unresolved routes
	232	* @mfc_unres_queue: list of unresolved MFC entries
	233	* @vif_table: array containing all possible vifs
	234	* @mfc_hash: Hash table of all resolved routes for easy lookup
	235	* @mfc_cache_list: list of resovled routes for possible traversal
	236	* @maxvif: Identifier of highest value vif currently in use
	237	* @cache_resolve_queue_len: current size of unresolved queue
	238	* @mroute_do_assert: Whether to inform userspace on wrong ingress
	239	* @mroute_do_pim: Whether to receive IGMP PIMv1
	240	* @mroute_reg_vif_num: PIM-device vif index
	241	*/
	242	struct mr_table {
	243	struct list_head list;
	244	possible_net_t net;
845c9a7a	245	struct mr_table_ops ops;
b70432f7 YM	246	u32 id;
	247	struct sock __rcu *mroute_sk;
	248	struct timer_list ipmr_expire_timer;
	249	struct list_head mfc_unres_queue;
	250	struct vif_device vif_table[MAXVIFS];
	251	struct rhltable mfc_hash;
	252	struct list_head mfc_cache_list;
	253	int maxvif;
	254	atomic_t cache_resolve_queue_len;
	255	bool mroute_do_assert;
	256	bool mroute_do_pim;
c921c207	257	bool mroute_do_wrvifwhole;
b70432f7 YM	258	int mroute_reg_vif_num;
	259	};
	260
6853f21f YM	261	#ifdef CONFIG_IP_MROUTE_COMMON
	262	void vif_device_init(struct vif_device *v,
	263	struct net_device *dev,
	264	unsigned long rate_limit,
	265	unsigned char threshold,
	266	unsigned short flags,
	267	unsigned short get_iflink_mask);
0bbbf0e7 YM	268
	269	struct mr_table *
	270	mr_table_alloc(struct net *net, u32 id,
845c9a7a	271	struct mr_table_ops *ops,
0bbbf0e7 YM	272	void (expire_func)(struct timer_list t),
	273	void (table_set)(struct mr_table mrt,
	274	struct net *net));
845c9a7a YM	275
	276	/* These actually return 'struct mr_mfc *', but to avoid need for explicit
	277	* castings they simply return void.
	278	*/
	279	void mr_mfc_find_parent(struct mr_table mrt,
	280	void *hasharg, int parent);
	281	void mr_mfc_find_any_parent(struct mr_table mrt, int vifi);
	282	void mr_mfc_find_any(struct mr_table mrt, int vifi, void *hasharg);
	283
7b0db857 YM	284	int mr_fill_mroute(struct mr_table mrt, struct sk_buff skb,
	285	struct mr_mfc c, struct rtmsg rtm);
	286	int mr_rtm_dumproute(struct sk_buff skb, struct netlink_callback cb,
	287	struct mr_table (iter)(struct net *net,
	288	struct mr_table *mrt),
	289	int (fill)(struct mr_table mrt,
	290	struct sk_buff *skb,
	291	u32 portid, u32 seq, struct mr_mfc *c,
	292	int cmd, int flags),
	293	spinlock_t *lock);
cdc9f944 YM	294
	295	int mr_dump(struct net net, struct notifier_block nb, unsigned short family,
	296	int (rules_dump)(struct net net,
	297	struct notifier_block *nb),
	298	struct mr_table (mr_iter)(struct net *net,
	299	struct mr_table *mrt),
	300	rwlock_t *mrt_lock);
6853f21f YM	301	#else
	302	static inline void vif_device_init(struct vif_device *v,
	303	struct net_device *dev,
	304	unsigned long rate_limit,
	305	unsigned char threshold,
	306	unsigned short flags,
	307	unsigned short get_iflink_mask)
	308	{
	309	}
0bbbf0e7	310
845c9a7a YM	311	static inline void mr_mfc_find_parent(struct mr_table mrt,
	312	void *hasharg, int parent)
	313	{
	314	return NULL;
	315	}
	316
	317	static inline void mr_mfc_find_any_parent(struct mr_table mrt,
	318	int vifi)
	319	{
	320	return NULL;
	321	}
	322
	323	static inline struct mr_mfc mr_mfc_find_any(struct mr_table mrt,
	324	int vifi, void *hasharg)
	325	{
	326	return NULL;
	327	}
7b0db857 YM	328
	329	static inline int mr_fill_mroute(struct mr_table mrt, struct sk_buff skb,
	330	struct mr_mfc c, struct rtmsg rtm)
	331	{
	332	return -EINVAL;
	333	}
	334
	335	static inline int
	336	mr_rtm_dumproute(struct sk_buff skb, struct netlink_callback cb,
	337	struct mr_table (iter)(struct net *net,
	338	struct mr_table *mrt),
	339	int (fill)(struct mr_table mrt,
	340	struct sk_buff *skb,
	341	u32 portid, u32 seq, struct mr_mfc *c,
	342	int cmd, int flags),
	343	spinlock_t *lock)
	344	{
	345	return -EINVAL;
	346	}
cdc9f944 YM	347
	348	static inline int mr_dump(struct net net, struct notifier_block nb,
	349	unsigned short family,
	350	int (rules_dump)(struct net net,
	351	struct notifier_block *nb),
	352	struct mr_table (mr_iter)(struct net *net,
	353	struct mr_table *mrt),
	354	rwlock_t *mrt_lock)
	355	{
	356	return -EINVAL;
	357	}
6853f21f	358	#endif
845c9a7a YM	359
	360	static inline void mr_mfc_find(struct mr_table mrt, void *hasharg)
	361	{
	362	return mr_mfc_find_parent(mrt, hasharg, -1);
	363	}
c8d61968 YM	364
c8d61968 YM	365	#ifdef CONFIG_PROC_FS
3feda6b4 YM	366	struct mr_vif_iter {
	367	struct seq_net_private p;
	368	struct mr_table *mrt;
	369	int ct;
	370	};
	371
c8d61968 YM	372	struct mr_mfc_iter {
	373	struct seq_net_private p;
	374	struct mr_table *mrt;
	375	struct list_head *cache;
	376
	377	/* Lock protecting the mr_table's unresolved queue */
	378	spinlock_t *lock;
	379	};
	380
	381	#ifdef CONFIG_IP_MROUTE_COMMON
3feda6b4 YM	382	void mr_vif_seq_idx(struct net net, struct mr_vif_iter *iter, loff_t pos);
	383	void mr_vif_seq_next(struct seq_file seq, void v, loff_t pos);
	384
	385	static inline void mr_vif_seq_start(struct seq_file seq, loff_t *pos)
	386	{
	387	return *pos ? mr_vif_seq_idx(seq_file_net(seq),
	388	seq->private, *pos - 1)
	389	: SEQ_START_TOKEN;
	390	}
	391
c8d61968 YM	392	/* These actually return 'struct mr_mfc *', but to avoid need for explicit
	393	* castings they simply return void.
	394	*/
	395	void mr_mfc_seq_idx(struct net net,
	396	struct mr_mfc_iter *it, loff_t pos);
	397	void mr_mfc_seq_next(struct seq_file seq, void *v,
	398	loff_t *pos);
	399
	400	static inline void mr_mfc_seq_start(struct seq_file seq, loff_t *pos,
	401	struct mr_table mrt, spinlock_t lock)
	402	{
	403	struct mr_mfc_iter *it = seq->private;
	404
	405	it->mrt = mrt;
	406	it->cache = NULL;
	407	it->lock = lock;
	408
	409	return *pos ? mr_mfc_seq_idx(seq_file_net(seq),
	410	seq->private, *pos - 1)
	411	: SEQ_START_TOKEN;
	412	}
	413
	414	static inline void mr_mfc_seq_stop(struct seq_file seq, void v)
	415	{
	416	struct mr_mfc_iter *it = seq->private;
	417	struct mr_table *mrt = it->mrt;
	418
	419	if (it->cache == &mrt->mfc_unres_queue)
	420	spin_unlock_bh(it->lock);
	421	else if (it->cache == &mrt->mfc_cache_list)
	422	rcu_read_unlock();
	423	}
	424	#else
3feda6b4 YM	425	static inline void mr_vif_seq_idx(struct net net, struct mr_vif_iter *iter,
	426	loff_t pos)
	427	{
	428	return NULL;
	429	}
	430
	431	static inline void mr_vif_seq_next(struct seq_file seq,
	432	void v, loff_t pos)
	433	{
	434	return NULL;
	435	}
	436
	437	static inline void mr_vif_seq_start(struct seq_file seq, loff_t *pos)
	438	{
	439	return NULL;
	440	}
	441
c8d61968 YM	442	static inline void mr_mfc_seq_idx(struct net net,
	443	struct mr_mfc_iter *it, loff_t pos)
	444	{
	445	return NULL;
	446	}
	447
	448	static inline void mr_mfc_seq_next(struct seq_file seq, void *v,
	449	loff_t *pos)
	450	{
	451	return NULL;
	452	}
	453
	454	static inline void mr_mfc_seq_start(struct seq_file seq, loff_t *pos,
	455	struct mr_table mrt, spinlock_t lock)
	456	{
	457	return NULL;
	458	}
	459
	460	static inline void mr_mfc_seq_stop(struct seq_file seq, void v)
	461	{
	462	}
	463	#endif
	464	#endif
6853f21f	465	#endif