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/*
* Operations on the network namespace
*/
#ifndef __NET_NET_NAMESPACE_H
#define __NET_NET_NAMESPACE_H
#include <linux/atomic.h>
#include <linux/workqueue.h>
#include <linux/list.h>
#include <linux/sysctl.h>
#include <linux/idr.h>
#include <net/netns/core.h>
#include <net/netns/mib.h>
#include <net/netns/unix.h>
#include <net/netns/packet.h>
#include <net/netns/ipv4.h>
#include <net/netns/ipv6.h>
#include <net/netns/ieee802154_6lowpan.h>
#include <net/netns/sctp.h>
#include <net/netns/dccp.h>
#include <net/netns/netfilter.h>
#include <net/netns/x_tables.h>
#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
#include <net/netns/conntrack.h>
#endif
#include <net/netns/nftables.h>
#include <net/netns/xfrm.h>
#include <linux/rh_kabi.h>
struct user_namespace;
struct proc_dir_entry;
struct net_device;
struct sock;
struct ctl_table_header;
struct net_generic;
struct sock;
struct netns_ipvs;
#define NETDEV_HASHBITS 8
#define NETDEV_HASHENTRIES (1 << NETDEV_HASHBITS)
struct net {
atomic_t passive; /* To decided when the network
* namespace should be freed.
*/
atomic_t count; /* To decided when the network
* namespace should be shut down.
*/
spinlock_t rules_mod_lock;
struct list_head list; /* list of network namespaces */
struct list_head cleanup_list; /* namespaces on death row */
struct list_head exit_list; /* Use only net_mutex */
struct user_namespace *user_ns; /* Owning user namespace */
unsigned int proc_inum;
struct proc_dir_entry *proc_net;
struct proc_dir_entry *proc_net_stat;
#ifdef CONFIG_SYSCTL
struct ctl_table_set sysctls;
#endif
struct sock *rtnl; /* rtnetlink socket */
struct sock *genl_sock;
struct list_head dev_base_head;
struct hlist_head *dev_name_head;
struct hlist_head *dev_index_head;
unsigned int dev_base_seq; /* protected by rtnl_mutex */
int ifindex;
/* core fib_rules */
struct list_head rules_ops;
struct net_device *loopback_dev; /* The loopback */
struct netns_core core;
struct netns_mib mib;
struct netns_packet packet;
struct netns_unix unx;
struct netns_ipv4 ipv4;
#if IS_ENABLED(CONFIG_IPV6)
struct netns_ipv6 ipv6;
#endif
#if defined(CONFIG_IP_SCTP) || defined(CONFIG_IP_SCTP_MODULE)
struct netns_sctp sctp;
#endif
#if defined(CONFIG_IP_DCCP) || defined(CONFIG_IP_DCCP_MODULE)
struct netns_dccp dccp;
#endif
#ifdef CONFIG_NETFILTER
struct netns_nf nf;
struct netns_xt xt;
#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
struct netns_ct ct;
#endif
#if defined(CONFIG_NF_TABLES) || defined(CONFIG_NF_TABLES_MODULE)
struct netns_nftables nft;
#endif
#if IS_ENABLED(CONFIG_NF_DEFRAG_IPV6)
struct netns_nf_frag nf_frag;
#endif
struct sock *nfnl;
struct sock *nfnl_stash;
#endif
#ifdef CONFIG_WEXT_CORE
struct sk_buff_head wext_nlevents;
#endif
struct net_generic __rcu *gen;
/* Note : following structs are cache line aligned */
#ifdef CONFIG_XFRM
struct netns_xfrm xfrm;
#endif
struct netns_ipvs *ipvs;
struct sock *diag_nlsk;
atomic_t rt_genid;
RH_KABI_EXTEND(unsigned int dev_unreg_count)
RH_KABI_EXTEND(atomic_t fnhe_genid)
RH_KABI_EXTEND(int sysctl_ip_no_pmtu_disc)
RH_KABI_EXTEND(int sysctl_ip_fwd_use_pmtu)
/* upstream has this as part of netns_ipv4 */
RH_KABI_EXTEND(struct local_ports ipv4_sysctl_local_ports)
RH_KABI_EXTEND(struct idr netns_ids)
RH_KABI_EXTEND(spinlock_t nsid_lock)
/* upstream has this as part of netns_ipv4 */
RH_KABI_EXTEND(struct sock * __percpu *ipv4_tcp_sk)
#ifdef CONFIG_XFRM
/* upstream has this as part of netns_xfrm */
RH_KABI_EXTEND(spinlock_t xfrm_state_lock)
RH_KABI_EXTEND(rwlock_t xfrm_policy_lock)
RH_KABI_EXTEND(struct mutex xfrm_cfg_mutex)
/* flow cache part */
RH_KABI_EXTEND(struct flow_cache flow_cache_global)
RH_KABI_EXTEND(atomic_t flow_cache_genid)
RH_KABI_EXTEND(struct list_head flow_cache_gc_list)
RH_KABI_EXTEND(spinlock_t flow_cache_gc_lock)
RH_KABI_EXTEND(struct work_struct flow_cache_gc_work)
RH_KABI_EXTEND(struct work_struct flow_cache_flush_work)
RH_KABI_EXTEND(struct mutex flow_flush_sem)
/* netns_xfrm */
RH_KABI_EXTEND(struct xfrm_policy_hash_ext policy_bydst[XFRM_POLICY_MAX * 2])
RH_KABI_EXTEND(struct xfrm_policy_hthresh policy_hthresh)
#endif
RH_KABI_EXTEND(bool ip_local_ports_warned)
RH_KABI_EXTEND(int ipv4_sysctl_ip_nonlocal_bind)
RH_KABI_EXTEND(int ipv6_sysctl_ip_nonlocal_bind)
RH_KABI_EXTEND(int ipv6_anycast_src_echo_reply)
RH_KABI_EXTEND(struct sock *ipv4_mc_autojoin_sk)
RH_KABI_EXTEND(struct sock *ipv6_mc_autojoin_sk)
RH_KABI_EXTEND(struct netns_ieee802154_lowpan ieee802154_lowpan)
/*
* Disable Potentially-Failed feature, the feature is enabled by default
* pf_enable - 0 : disable pf
* - >0 : enable pf
*/
RH_KABI_EXTEND(int sctp_pf_enable)
RH_KABI_EXTEND(struct list_head nfct_timeout_list)
#if IS_ENABLED(CONFIG_NF_CONNTRACK) && defined(CONFIG_NF_CT_PROTO_DCCP)
RH_KABI_EXTEND(struct nf_dccp_net ct_dccp)
#endif
#if IS_ENABLED(CONFIG_NF_CONNTRACK) && defined(CONFIG_NF_CT_PROTO_SCTP)
RH_KABI_EXTEND(struct nf_sctp_net ct_sctp)
#endif
#if IS_ENABLED(CONFIG_NF_CONNTRACK) && defined(CONFIG_NF_CT_PROTO_UDPLITE)
RH_KABI_EXTEND(struct nf_udplite_net rh_reserved_ct_udplite)
#endif
RH_KABI_EXTEND(int idgen_retries)
RH_KABI_EXTEND(int idgen_delay)
RH_KABI_EXTEND(struct ucounts *ucounts)
RH_KABI_EXTEND(int ipv4_sysctl_fwmark_reflect)
RH_KABI_EXTEND(int ipv6_sysctl_fwmark_reflect)
RH_KABI_EXTEND(int ipv4_sysctl_tcp_keepalive_time)
RH_KABI_EXTEND(int ipv4_sysctl_tcp_keepalive_probes)
RH_KABI_EXTEND(int ipv4_sysctl_tcp_keepalive_intvl)
RH_KABI_EXTEND(struct list_head fib_notifier_ops) /* protected by net_mutex */
/* upstream has this as part of netns_ipv4 */
RH_KABI_EXTEND(struct fib_notifier_ops *ipv4_notifier_ops)
/* upstream has this as part of netns_ipv6 */
RH_KABI_EXTEND(struct fib_notifier_ops *ipv6_notifier_ops)
#ifdef CONFIG_IP_ROUTE_MULTIPATH
RH_KABI_EXTEND(int ipv4_sysctl_fib_multipath_hash_policy)
#endif
RH_KABI_EXTEND(int ipv4_sysctl_ip_default_ttl)
/* upstream has this as part of netns_ipv4 */
RH_KABI_EXTEND(struct fib_notifier_ops *ipv4_ipmr_notifier_ops)
RH_KABI_EXTEND(unsigned int ipv4_ipmr_seq) /* protected by rtnl_mutex */
RH_KABI_EXTEND(int ipv4_sysctl_tcp_min_snd_mss)
};
/*
* ifindex generation is per-net namespace, and loopback is
* always the 1st device in ns (see net_dev_init), thus any
* loopback device should get ifindex 1
*/
#define LOOPBACK_IFINDEX 1
#include <linux/seq_file_net.h>
/* Init's network namespace */
extern struct net init_net;
#ifdef CONFIG_NET_NS
extern struct net *copy_net_ns(unsigned long flags,
struct user_namespace *user_ns, struct net *old_net);
#else /* CONFIG_NET_NS */
#include <linux/sched.h>
#include <linux/nsproxy.h>
static inline struct net *copy_net_ns(unsigned long flags,
struct user_namespace *user_ns, struct net *old_net)
{
if (flags & CLONE_NEWNET)
return ERR_PTR(-EINVAL);
return old_net;
}
#endif /* CONFIG_NET_NS */
extern struct list_head net_namespace_list;
extern struct net *get_net_ns_by_pid(pid_t pid);
extern struct net *get_net_ns_by_fd(int pid);
#ifdef CONFIG_NET_NS
extern void __put_net(struct net *net);
static inline struct net *get_net(struct net *net)
{
atomic_inc(&net->count);
return net;
}
static inline struct net *maybe_get_net(struct net *net)
{
/* Used when we know struct net exists but we
* aren't guaranteed a previous reference count
* exists. If the reference count is zero this
* function fails and returns NULL.
*/
if (!atomic_inc_not_zero(&net->count))
net = NULL;
return net;
}
static inline void put_net(struct net *net)
{
if (atomic_dec_and_test(&net->count))
__put_net(net);
}
static inline
int net_eq(const struct net *net1, const struct net *net2)
{
return net1 == net2;
}
extern void net_drop_ns(void *);
#else
static inline struct net *get_net(struct net *net)
{
return net;
}
static inline void put_net(struct net *net)
{
}
static inline struct net *maybe_get_net(struct net *net)
{
return net;
}
static inline
int net_eq(const struct net *net1, const struct net *net2)
{
return 1;
}
#define net_drop_ns NULL
#endif
#define possible_net_t struct net *
static inline void write_pnet(possible_net_t *pnet, struct net *net)
{
#ifdef CONFIG_NET_NS
*pnet = net;
#endif
}
static inline struct net *read_pnet(possible_net_t const *pnet)
{
#ifdef CONFIG_NET_NS
return *pnet;
#else
return &init_net;
#endif
}
#define for_each_net(VAR) \
list_for_each_entry(VAR, &net_namespace_list, list)
#define for_each_net_rcu(VAR) \
list_for_each_entry_rcu(VAR, &net_namespace_list, list)
#ifdef CONFIG_NET_NS
#define __net_init
#define __net_exit
#define __net_initdata
#define __net_initconst
#else
#define __net_init __init
#define __net_exit __exit_refok
#define __net_initdata __initdata
#define __net_initconst __initconst
#endif
int peernet2id_alloc(struct net *net, struct net *peer);
int peernet2id(struct net *net, struct net *peer);
bool peernet_has_id(struct net *net, struct net *peer);
struct net *get_net_ns_by_id(struct net *net, int id);
struct pernet_operations {
struct list_head list;
int (*init)(struct net *net);
void (*exit)(struct net *net);
void (*exit_batch)(struct list_head *net_exit_list);
int *id;
size_t size;
};
/*
* Use these carefully. If you implement a network device and it
* needs per network namespace operations use device pernet operations,
* otherwise use pernet subsys operations.
*
* Network interfaces need to be removed from a dying netns _before_
* subsys notifiers can be called, as most of the network code cleanup
* (which is done from subsys notifiers) runs with the assumption that
* dev_remove_pack has been called so no new packets will arrive during
* and after the cleanup functions have been called. dev_remove_pack
* is not per namespace so instead the guarantee of no more packets
* arriving in a network namespace is provided by ensuring that all
* network devices and all sockets have left the network namespace
* before the cleanup methods are called.
*
* For the longest time the ipv4 icmp code was registered as a pernet
* device which caused kernel oops, and panics during network
* namespace cleanup. So please don't get this wrong.
*/
extern int register_pernet_subsys(struct pernet_operations *);
extern void unregister_pernet_subsys(struct pernet_operations *);
extern int register_pernet_device(struct pernet_operations *);
extern void unregister_pernet_device(struct pernet_operations *);
struct ctl_table;
struct ctl_table_header;
#ifdef CONFIG_SYSCTL
extern int net_sysctl_init(void);
extern struct ctl_table_header *register_net_sysctl(struct net *net,
const char *path, struct ctl_table *table);
extern void unregister_net_sysctl_table(struct ctl_table_header *header);
#else
static inline int net_sysctl_init(void) { return 0; }
static inline struct ctl_table_header *register_net_sysctl(struct net *net,
const char *path, struct ctl_table *table)
{
return NULL;
}
static inline void unregister_net_sysctl_table(struct ctl_table_header *header)
{
}
#endif
static inline int rt_genid_ipv4(struct net *net)
{
return atomic_read(&net->rt_genid);
}
static inline void rt_genid_bump_ipv4(struct net *net)
{
atomic_inc(&net->rt_genid);
}
extern void (*__fib6_flush_trees)(struct net *net);
static inline void rt_genid_bump_ipv6(struct net *net)
{
if (__fib6_flush_trees)
__fib6_flush_trees(net);
}
#if IS_ENABLED(CONFIG_IEEE802154_6LOWPAN)
static inline struct netns_ieee802154_lowpan *
net_ieee802154_lowpan(struct net *net)
{
return &net->ieee802154_lowpan;
}
#endif
/* For callers who don't really care about whether it's IPv4 or IPv6 */
static inline void rt_genid_bump_all(struct net *net)
{
rt_genid_bump_ipv4(net);
rt_genid_bump_ipv6(net);
}
static inline int fnhe_genid(struct net *net)
{
return atomic_read(&net->fnhe_genid);
}
static inline void fnhe_genid_bump(struct net *net)
{
atomic_inc(&net->fnhe_genid);
}
#endif /* __NET_NET_NAMESPACE_H */
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