FM / net

/usr/src/kernels/4.18.0-553.121.1.el8_10.x86_64/include/net/

/usr/src/kernels/4.18.0-553.121.1.el8_10.x86_64/include/net

Name	Size	Mode	Actions
9p/	-	0755	rm
bluetooth/	-	0755	rm
caif/	-	0755	rm
iucv/	-	0755	rm
mana/	-	0755	rm
netfilter/	-	0755	rm
netns/	-	0755	rm
nfc/	-	0755	rm
phonet/	-	0755	rm
sctp/	-	0755	rm
tc_act/	-	0755	rm
6lowpan.h	10271	0644	edit dl rm
act_api.h	9478	0644	edit dl rm
addrconf.h	13826	0644	edit dl rm
af_ieee802154.h	1591	0644	edit dl rm
af_rxrpc.h	2976	0644	edit dl rm
af_unix.h	2272	0644	edit dl rm
af_vsock.h	7295	0644	edit dl rm
ah.h	382	0644	edit dl rm
arp.h	2052	0644	edit dl rm
atmclip.h	1515	0644	edit dl rm
ax25.h	14999	0644	edit dl rm
ax88796.h	1488	0644	edit dl rm
bareudp.h	333	0644	edit dl rm
bonding.h	20225	0644	edit dl rm
bond_3ad.h	9629	0644	edit dl rm
bond_alb.h	6251	0644	edit dl rm
bond_options.h	3916	0644	edit dl rm
bpf_sk_storage.h	1802	0644	edit dl rm
busy_poll.h	4973	0644	edit dl rm
calipso.h	2199	0644	edit dl rm
cfg80211-wext.h	1900	0644	edit dl rm
cfg80211.h	325844	0644	edit dl rm
cfg802154.h	11175	0644	edit dl rm
checksum.h	4850	0644	edit dl rm
cipso_ipv4.h	8399	0644	edit dl rm
cls_cgroup.h	2301	0644	edit dl rm
codel.h	6000	0644	edit dl rm
codel_impl.h	8500	0644	edit dl rm
codel_qdisc.h	3001	0644	edit dl rm
compat.h	1711	0644	edit dl rm
datalink.h	619	0644	edit dl rm
dcbevent.h	1293	0644	edit dl rm
dcbnl.h	5267	0644	edit dl rm
devlink.h	64711	0644	edit dl rm
dn.h	7046	0644	edit dl rm
dn_dev.h	5488	0644	edit dl rm
dn_fib.h	4077	0644	edit dl rm
dn_neigh.h	968	0644	edit dl rm
dn_nsp.h	5966	0644	edit dl rm
dn_route.h	4500	0644	edit dl rm
dropreason-core.h	12063	0644	edit dl rm
drop_monitor.h	901	0644	edit dl rm
dsa.h	16605	0644	edit dl rm
dsfield.h	1139	0644	edit dl rm
dst.h	14870	0644	edit dl rm
dst_cache.h	2596	0644	edit dl rm
dst_metadata.h	5521	0644	edit dl rm
dst_ops.h	2564	0644	edit dl rm
erspan.h	8527	0644	edit dl rm
esp.h	1190	0644	edit dl rm
espintcp.h	966	0644	edit dl rm
ethoc.h	537	0644	edit dl rm
failover.h	1178	0644	edit dl rm
fib_notifier.h	1476	0644	edit dl rm
fib_rules.h	5728	0644	edit dl rm
firewire.h	636	0644	edit dl rm
flow.h	6353	0644	edit dl rm
flow_dissector.h	11284	0644	edit dl rm
flow_offload.h	17797	0644	edit dl rm
fou.h	549	0644	edit dl rm
fq.h	2497	0644	edit dl rm
fq_impl.h	8144	0644	edit dl rm
garp.h	2678	0644	edit dl rm
genetlink.h	14647	0644	edit dl rm
geneve.h	1898	0644	edit dl rm
gen_stats.h	3034	0644	edit dl rm
gre.h	3377	0644	edit dl rm
gro_cells.h	443	0644	edit dl rm
gtp.h	633	0644	edit dl rm
gue.h	3311	0644	edit dl rm
hwbm.h	937	0644	edit dl rm
icmp.h	1765	0644	edit dl rm
ieee80211_radiotap.h	23017	0644	edit dl rm
ieee802154_netdev.h	9358	0644	edit dl rm
ife.h	1057	0644	edit dl rm
if_inet6.h	6591	0644	edit dl rm
ila.h	498	0644	edit dl rm
inet6_connection_sock.h	976	0644	edit dl rm
inet6_hashtables.h	3746	0644	edit dl rm
inetpeer.h	3372	0644	edit dl rm
inet_common.h	2614	0644	edit dl rm
inet_connection_sock.h	11981	0644	edit dl rm
inet_ecn.h	8071	0644	edit dl rm
inet_frag.h	4816	0644	edit dl rm
inet_hashtables.h	13847	0644	edit dl rm
inet_sock.h	9828	0644	edit dl rm
inet_timewait_sock.h	3926	0644	edit dl rm
ip.h	21354	0644	edit dl rm
ip6_checksum.h	2981	0644	edit dl rm
ip6_fib.h	13766	0644	edit dl rm
ip6_route.h	9228	0644	edit dl rm
ip6_tunnel.h	5096	0644	edit dl rm
ipcomp.h	659	0644	edit dl rm
ipconfig.h	811	0644	edit dl rm
ipv6.h	32741	0644	edit dl rm
ipv6_frag.h	3321	0644	edit dl rm
ipv6_stubs.h	2671	0644	edit dl rm
ipx.h	4386	0644	edit dl rm
ip_fib.h	14290	0644	edit dl rm
ip_tunnels.h	14697	0644	edit dl rm
ip_vs.h	49407	0644	edit dl rm
iw_handler.h	21413	0644	edit dl rm
kcm.h	5083	0644	edit dl rm
l3mdev.h	6743	0644	edit dl rm
lag.h	409	0644	edit dl rm
lapb.h	4869	0644	edit dl rm
lib80211.h	4017	0644	edit dl rm
llc.h	4464	0644	edit dl rm
llc_conn.h	4155	0644	edit dl rm
llc_c_ac.h	9537	0644	edit dl rm
llc_c_ev.h	10940	0644	edit dl rm
llc_c_st.h	1762	0644	edit dl rm
llc_if.h	2210	0644	edit dl rm
llc_pdu.h	14783	0644	edit dl rm
llc_sap.h	1108	0644	edit dl rm
llc_s_ac.h	1591	0644	edit dl rm
llc_s_ev.h	2255	0644	edit dl rm
llc_s_st.h	947	0644	edit dl rm
lwtunnel.h	6563	0644	edit dl rm
mac80211.h	294437	0644	edit dl rm
mac802154.h	15633	0644	edit dl rm
mip6.h	1617	0644	edit dl rm
mld.h	2870	0644	edit dl rm
mpls.h	1340	0644	edit dl rm
mpls_iptunnel.h	827	0644	edit dl rm
mptcp.h	6242	0644	edit dl rm
mrp.h	3103	0644	edit dl rm
ncsi.h	1964	0644	edit dl rm
ndisc.h	15095	0644	edit dl rm
neighbour.h	16289	0644	edit dl rm
netdev_queues.h	5609	0644	edit dl rm
netevent.h	1044	0644	edit dl rm
netlabel.h	21236	0644	edit dl rm
netlink.h	63253	0644	edit dl rm
netprio_cgroup.h	1260	0644	edit dl rm
netrom.h	7896	0644	edit dl rm
net_failover.h	1023	0644	edit dl rm
net_namespace.h	14177	0644	edit dl rm
net_ratelimit.h	220	0644	edit dl rm
nexthop.h	865	0644	edit dl rm
nl802154.h	12385	0644	edit dl rm
nsh.h	12602	0644	edit dl rm
p8022.h	447	0644	edit dl rm
page_pool.h	6985	0644	edit dl rm
pie.h	3684	0644	edit dl rm
ping.h	3197	0644	edit dl rm
pkt_cls.h	26178	0644	edit dl rm
pkt_sched.h	6543	0644	edit dl rm
pptp.h	557	0644	edit dl rm
protocol.h	4320	0644	edit dl rm
psample.h	1083	0644	edit dl rm
psnap.h	351	0644	edit dl rm
raw.h	2161	0644	edit dl rm
rawv6.h	856	0644	edit dl rm
red.h	11600	0644	edit dl rm
regulatory.h	10961	0644	edit dl rm
request_sock.h	6871	0644	edit dl rm
rose.h	7802	0644	edit dl rm
route.h	11390	0644	edit dl rm
rsi_91x.h	1710	0644	edit dl rm
rtnetlink.h	7212	0644	edit dl rm
sch_generic.h	33841	0644	edit dl rm
scm.h	3671	0644	edit dl rm
secure_seq.h	855	0644	edit dl rm
seg6.h	1874	0644	edit dl rm
seg6_hmac.h	1699	0644	edit dl rm
seg6_local.h	870	0644	edit dl rm
slhc_vj.h	6831	0644	edit dl rm
smc.h	2155	0644	edit dl rm
snmp.h	5482	0644	edit dl rm
sock.h	79182	0644	edit dl rm
sock_reuseport.h	1565	0644	edit dl rm
Space.h	1094	0644	edit dl rm
stp.h	383	0644	edit dl rm
strparser.h	4340	0644	edit dl rm
switchdev.h	17812	0644	edit dl rm
tcp.h	73125	0644	edit dl rm
tcp_states.h	1540	0644	edit dl rm
tc_wrapper.h	7033	0644	edit dl rm
timewait_sock.h	1136	0644	edit dl rm
tipc.h	2405	0644	edit dl rm
tls.h	21363	0644	edit dl rm
tls_toe.h	3006	0644	edit dl rm
transp_v6.h	1996	0644	edit dl rm
tso.h	515	0644	edit dl rm
tun_proto.h	988	0644	edit dl rm
udp.h	16481	0644	edit dl rm
udplite.h	3762	0644	edit dl rm
udp_tunnel.h	13376	0644	edit dl rm
vsock_addr.h	662	0644	edit dl rm
vxlan.h	13541	0644	edit dl rm
wext.h	1510	0644	edit dl rm
wimax.h	20445	0644	edit dl rm
x25.h	9658	0644	edit dl rm
x25device.h	387	0644	edit dl rm
xdp.h	9436	0644	edit dl rm
xdp_priv.h	446	0644	edit dl rm
xdp_sock.h	2094	0644	edit dl rm
xdp_sock_drv.h	6423	0644	edit dl rm
xfrm.h	59628	0644	edit dl rm
xsk_buff_pool.h	6550	0644	edit dl rm

Edit: /usr/src/kernels/4.18.0-553.121.1.el8_10.x86_64/include/net/net_namespace.h (14177B)

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Operations on the network namespace
 */
#ifndef __NET_NET_NAMESPACE_H
#define __NET_NET_NAMESPACE_H

#include <linux/rh_kabi.h>

#include <linux/atomic.h>
#include <linux/refcount.h>
#include <linux/workqueue.h>
#include <linux/list.h>
#include <linux/sysctl.h>
#include <linux/uidgid.h>

#include <net/flow.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 <net/netns/mpls.h>
#include <net/netns/can.h>
#include RH_KABI_HIDE_INCLUDE(<net/netns/xdp.h>)
#include <net/netns/smc.h>
#include <net/netns/bpf.h>
#include <linux/ns_common.h>
#include <linux/idr.h>
#include <linux/skbuff.h>
#include <linux/notifier.h>
#include <linux/siphash.h>

struct user_namespace;
struct proc_dir_entry;
struct net_device;
struct sock;
struct ctl_table_header;
struct net_generic;
struct uevent_sock;
struct netns_ipvs;
struct bpf_prog;

#define NETDEV_HASHBITS    8
#define NETDEV_HASHENTRIES (1 << NETDEV_HASHBITS)

struct net {
	refcount_t		passive;	/* To decided when the network
						 * namespace should be freed.
						 */
	refcount_t		count;		/* To decided when the network
						 *  namespace should be shut down.
						 */
	spinlock_t		rules_mod_lock;

RH_KABI_DEPRECATE(atomic64_t,		cookie_gen)

struct list_head	list;		/* list of network namespaces */
	struct list_head	exit_list;	/* To linked to call pernet exit
						 * methods on dead net (
						 * pernet_ops_rwsem read locked),
						 * or to unregister pernet ops
						 * (pernet_ops_rwsem write locked).
						 */
	struct llist_node	cleanup_list;	/* namespaces on death row */

struct user_namespace   *user_ns;	/* Owning user namespace */
	struct ucounts		*ucounts;
	spinlock_t		nsid_lock;
	struct idr		netns_ids;

struct ns_common	ns;

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 uevent_sock	*uevent_sock;		/* uevent socket */

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;
	unsigned int		dev_unreg_count;

/* core fib_rules */
	struct list_head	rules_ops;

RH_KABI_DEPRECATE(struct list_head, fib_notifier_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 IS_ENABLED(CONFIG_IEEE802154_6LOWPAN)
	struct netns_ieee802154_lowpan	ieee802154_lowpan;
#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;
	struct ctl_table_header *nf_frag_frags_hdr;
#endif
	struct sock		*nfnl;
	struct sock		*nfnl_stash;
#if IS_ENABLED(CONFIG_NETFILTER_NETLINK_ACCT)
	struct list_head        nfnl_acct_list;
#endif
#if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT)
	struct list_head	nfct_timeout_list;
#endif
#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
#if IS_ENABLED(CONFIG_IP_VS)
	struct netns_ipvs	*ipvs;
#endif
#if IS_ENABLED(CONFIG_MPLS)
	struct netns_mpls	mpls;
#endif
#if IS_ENABLED(CONFIG_CAN)
	struct netns_can	can;
#endif
	struct sock		*diag_nlsk;
	atomic_t		fnhe_genid;

RH_KABI_EXTEND(int	ipv4_sysctl_ip_fwd_update_priority)
	RH_KABI_EXTEND(int	ipv4_sysctl_tcp_min_snd_mss)
	RH_KABI_EXTEND(void *rh_unused)		/* available for reuse */
	RH_KABI_EXTEND(siphash_key_t ipv4_ip_id_key)
	RH_KABI_EXTEND(u32	hash_mix)
	RH_KABI_EXTEND_WITH_SIZE(struct netns_xdp xdp, 21)
	RH_KABI_EXTEND(int	sctp_ecn_enable)
	RH_KABI_EXTEND(struct list_head        xfrm_inexact_bins)
	RH_KABI_EXTEND(struct raw_notifier_head	netdev_chain)
	RH_KABI_EXTEND(struct list_head		nft_module_list)
	RH_KABI_EXTEND(struct list_head		nft_notify_list)
	RH_KABI_EXTEND(struct mutex		nft_commit_mutex)
#ifdef CONFIG_NF_CT_PROTO_GRE
	RH_KABI_EXTEND(struct nf_gre_net	nf_ct_gre)
#endif
	RH_KABI_EXTEND(DEFINE_SNMP_STAT(struct linux_tls_mib, mib_tls_statistics))
#ifdef CONFIG_MPTCP
	RH_KABI_EXTEND(struct netns_mptcp_mib  mptcp_mib)
#endif
	RH_KABI_EXTEND(atomic64_t		net_cookie) /* written once */
	RH_KABI_EXTEND(int	sctp_pf_expose)
	RH_KABI_EXTEND(int	sctp_ps_retrans)
	RH_KABI_EXTEND_WITH_SIZE(struct netns_bpf bpf, 128)
	/* UDP tunneling listening sock. */
	RH_KABI_EXTEND(struct sock	*sctp_udp4_sock)
	RH_KABI_EXTEND(struct sock	*sctp_udp6_sock)
	/* UDP tunneling listening port. */
	RH_KABI_EXTEND(int	sctp_udp_port)
	/* UDP tunneling remote encap port. */
	RH_KABI_EXTEND(int	sctp_encap_port)
	RH_KABI_EXTEND(seqcount_spinlock_t	xfrm_state_hash_generation)
	RH_KABI_EXTEND(unsigned int nf_tcp_net_offload_timeout)
	RH_KABI_EXTEND(unsigned int nf_udp_net_offload_timeout)
#if IS_ENABLED(CONFIG_SMC)
	RH_KABI_EXTEND(struct netns_smc		smc)
#endif
	RH_KABI_EXTEND(seqcount_spinlock_t	xfrm_policy_hash_generation)
	/* The interval for PLPMTUD probe timer */
	RH_KABI_EXTEND(unsigned int	sctp_probe_interval)
	RH_KABI_EXTEND(struct hlist_head	__rcu *xfrm_state_byseq)
	RH_KABI_EXTEND(u32	ipv4_sysctl_fib_multipath_hash_fields)
	RH_KABI_EXTEND(u32	ipv6_sysctl_multipath_hash_fields)
#if IS_ENABLED(CONFIG_RPS) && IS_ENABLED(CONFIG_SYSCTL)
	RH_KABI_EXTEND(struct cpumask *core_rps_default_mask)
#endif
	RH_KABI_EXTEND(u64 nft_table_handle)
	RH_KABI_EXTEND(int	sysctl_txrehash)
	RH_KABI_EXTEND(u8	ipv4_sysctl_tcp_shrink_window)

} __randomize_layout;

#include <linux/seq_file_net.h>

/* Init's network namespace */
extern struct net init_net;

#ifdef CONFIG_NET_NS
struct net *copy_net_ns(unsigned long flags, struct user_namespace *user_ns,
			struct net *old_net);

void net_ns_get_ownership(const struct net *net, kuid_t *uid, kgid_t *gid);

void net_ns_barrier(void);
#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;
}

static inline void net_ns_get_ownership(const struct net *net,
					kuid_t *uid, kgid_t *gid)
{
	*uid = GLOBAL_ROOT_UID;
	*gid = GLOBAL_ROOT_GID;
}

static inline void net_ns_barrier(void) {}
#endif /* CONFIG_NET_NS */

extern struct list_head net_namespace_list;

struct net *get_net_ns_by_pid(pid_t pid);
struct net *get_net_ns_by_fd(int fd);

u64 __net_gen_cookie(struct net *net);

#ifdef CONFIG_SYSCTL
void ipx_register_sysctl(void);
void ipx_unregister_sysctl(void);
#else
#define ipx_register_sysctl()
#define ipx_unregister_sysctl()
#endif

#ifdef CONFIG_NET_NS
void __put_net(struct net *net);

static inline struct net *get_net(struct net *net)
{
	refcount_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 (!refcount_inc_not_zero(&net->count))
		net = NULL;
	return net;
}

static inline void put_net(struct net *net)
{
	if (refcount_dec_and_test(&net->count))
		__put_net(net);
}

static inline
int net_eq(const struct net *net1, const struct net *net2)
{
	return net1 == net2;
}

static inline int check_net(const struct net *net)
{
	return refcount_read(&net->count) != 0;
}

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;
}

static inline int check_net(const struct net *net)
{
	return 1;
}

#define net_drop_ns NULL
#endif

typedef struct {
#ifdef CONFIG_NET_NS
	struct net __rcu *net;
#endif
} possible_net_t;

static inline void write_pnet(possible_net_t *pnet, struct net *net)
{
#ifdef CONFIG_NET_NS
	rcu_assign_pointer(pnet->net, net);
#endif
}

static inline struct net *read_pnet(const possible_net_t *pnet)
{
#ifdef CONFIG_NET_NS
	return rcu_dereference_protected(pnet->net, true);
#else
	return &init_net;
#endif
}

static inline struct net *read_pnet_rcu(const possible_net_t *pnet)
{
#ifdef CONFIG_NET_NS
	return rcu_dereference(pnet->net);
#else
	return &init_net;
#endif
}

/* Protected by net_rwsem */
#define for_each_net(VAR)				\
	list_for_each_entry(VAR, &net_namespace_list, list)
#define for_each_net_continue_reverse(VAR)		\
	list_for_each_entry_continue_reverse(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	__ref
#define __net_initdata	__initdata
#define __net_initconst	__initconst
#endif

int peernet2id_alloc(struct net *net, struct net *peer, gfp_t gfp);
int peernet2id(const struct net *net, struct net *peer);
bool peernet_has_id(const struct net *net, struct net *peer);
struct net *get_net_ns_by_id(const struct net *net, int id);

struct pernet_operations {
	struct list_head list;
	/*
	 * Below methods are called without any exclusive locks.
	 * More than one net may be constructed and destructed
	 * in parallel on several cpus. Every pernet_operations
	 * have to keep in mind all other pernet_operations and
	 * to introduce a locking, if they share common resources.
	 *
	 * The only time they are called with exclusive lock is
	 * from register_pernet_subsys(), unregister_pernet_subsys()
	 * register_pernet_device() and unregister_pernet_device().
	 *
	 * Exit methods using blocking RCU primitives, such as
	 * synchronize_rcu(), should be implemented via exit_batch.
	 * Then, destruction of a group of net requires single
	 * synchronize_rcu() related to these pernet_operations,
	 * instead of separate synchronize_rcu() for every net.
	 * Please, avoid synchronize_rcu() at all, where it's possible.
	 *
	 * Note that a combination of pre_exit() and exit() can
	 * be used, since a synchronize_rcu() is guaranteed between
	 * the calls.
	 */
	int (*init)(struct net *net);
	void (*pre_exit)(struct net *net);
	void (*exit)(struct net *net);
	void (*exit_batch)(struct list_head *net_exit_list);
	unsigned 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.
 */
int register_pernet_subsys(struct pernet_operations *);
void unregister_pernet_subsys(struct pernet_operations *);
int register_pernet_device(struct pernet_operations *);
void unregister_pernet_device(struct pernet_operations *);

struct ctl_table;
struct ctl_table_header;

#ifdef CONFIG_SYSCTL
int net_sysctl_init(void);
struct ctl_table_header *register_net_sysctl(struct net *net, const char *path,
					     struct ctl_table *table);
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(const struct net *net)
{
	return atomic_read(&net->ipv4.rt_genid);
}

static inline void rt_genid_bump_ipv4(struct net *net)
{
	atomic_inc(&net->ipv4.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(const 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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