478 lines
12 KiB
C
478 lines
12 KiB
C
#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>
|
|
#include <net/ip_fib.h>
|
|
|
|
/**
|
|
* struct vif_device - interface representor for multicast routing
|
|
* @dev: network device being used
|
|
* @dev_tracker: refcount tracker for @dev reference
|
|
* @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 __rcu *dev;
|
|
netdevice_tracker dev_tracker;
|
|
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,
|
|
unsigned short family,
|
|
enum fib_event_type event_type,
|
|
struct vif_device *vif,
|
|
struct net_device *vif_dev,
|
|
unsigned short vif_index, u32 tb_id,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct vif_entry_notifier_info info = {
|
|
.info = {
|
|
.family = family,
|
|
.extack = extack,
|
|
},
|
|
.dev = vif_dev,
|
|
.vif_index = vif_index,
|
|
.vif_flags = vif->flags,
|
|
.tb_id = tb_id,
|
|
};
|
|
|
|
return call_fib_notifier(nb, 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,
|
|
struct net_device *vif_dev,
|
|
unsigned short vif_index, u32 tb_id,
|
|
unsigned int *ipmr_seq)
|
|
{
|
|
struct vif_entry_notifier_info info = {
|
|
.info = {
|
|
.family = family,
|
|
},
|
|
.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
|
|
|
|
/* Note: This helper is deprecated. */
|
|
#define VIF_EXISTS(_mrt, _idx) (!!rcu_access_pointer((_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,
|
|
unsigned short family,
|
|
enum fib_event_type event_type,
|
|
struct mr_mfc *mfc, u32 tb_id,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct mfc_entry_notifier_info info = {
|
|
.info = {
|
|
.family = family,
|
|
.extack = extack,
|
|
},
|
|
.mfc = mfc,
|
|
.tb_id = tb_id
|
|
};
|
|
|
|
return call_fib_notifier(nb, 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,
|
|
},
|
|
.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_table_dump(struct mr_table *mrt, struct sk_buff *skb,
|
|
struct netlink_callback *cb,
|
|
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, struct fib_dump_filter *filter);
|
|
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, struct fib_dump_filter *filter);
|
|
|
|
int mr_dump(struct net *net, struct notifier_block *nb, unsigned short family,
|
|
int (*rules_dump)(struct net *net,
|
|
struct notifier_block *nb,
|
|
struct netlink_ext_ack *extack),
|
|
struct mr_table *(*mr_iter)(struct net *net,
|
|
struct mr_table *mrt),
|
|
struct netlink_ext_ack *extack);
|
|
#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, struct fib_dump_filter *filter)
|
|
{
|
|
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 netlink_ext_ack *extack),
|
|
struct mr_table *(*mr_iter)(struct net *net,
|
|
struct mr_table *mrt),
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
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
|