2007-09-12 03:50:50 -06:00
|
|
|
/*
|
|
|
|
* Operations on the network namespace
|
|
|
|
*/
|
|
|
|
#ifndef __NET_NET_NAMESPACE_H
|
|
|
|
#define __NET_NET_NAMESPACE_H
|
|
|
|
|
2011-07-26 17:09:06 -06:00
|
|
|
#include <linux/atomic.h>
|
2007-09-12 03:50:50 -06:00
|
|
|
#include <linux/workqueue.h>
|
|
|
|
#include <linux/list.h>
|
2011-05-26 14:40:37 -06:00
|
|
|
#include <linux/sysctl.h>
|
2007-09-12 03:50:50 -06:00
|
|
|
|
ipv4, fib: pass LOOPBACK_IFINDEX instead of 0 to flowi4_iif
As suggested by Julian:
Simply, flowi4_iif must not contain 0, it does not
look logical to ignore all ip rules with specified iif.
because in fib_rule_match() we do:
if (rule->iifindex && (rule->iifindex != fl->flowi_iif))
goto out;
flowi4_iif should be LOOPBACK_IFINDEX by default.
We need to move LOOPBACK_IFINDEX to include/net/flow.h:
1) It is mostly used by flowi_iif
2) Fix the following compile error if we use it in flow.h
by the patches latter:
In file included from include/linux/netfilter.h:277:0,
from include/net/netns/netfilter.h:5,
from include/net/net_namespace.h:21,
from include/linux/netdevice.h:43,
from include/linux/icmpv6.h:12,
from include/linux/ipv6.h:61,
from include/net/ipv6.h:16,
from include/linux/sunrpc/clnt.h:27,
from include/linux/nfs_fs.h:30,
from init/do_mounts.c:32:
include/net/flow.h: In function ‘flowi4_init_output’:
include/net/flow.h:84:32: error: ‘LOOPBACK_IFINDEX’ undeclared (first use in this function)
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Julian Anastasov <ja@ssi.bg>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Cong Wang <cwang@twopensource.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-15 17:25:34 -06:00
|
|
|
#include <net/flow.h>
|
2008-03-31 20:41:14 -06:00
|
|
|
#include <net/netns/core.h>
|
2008-07-18 05:01:24 -06:00
|
|
|
#include <net/netns/mib.h>
|
2007-12-11 05:19:17 -07:00
|
|
|
#include <net/netns/unix.h>
|
2007-12-11 05:19:54 -07:00
|
|
|
#include <net/netns/packet.h>
|
2007-12-16 14:29:36 -07:00
|
|
|
#include <net/netns/ipv4.h>
|
2008-01-10 03:49:06 -07:00
|
|
|
#include <net/netns/ipv6.h>
|
2014-02-27 23:32:49 -07:00
|
|
|
#include <net/netns/ieee802154_6lowpan.h>
|
2012-08-06 02:42:04 -06:00
|
|
|
#include <net/netns/sctp.h>
|
2008-04-13 23:28:42 -06:00
|
|
|
#include <net/netns/dccp.h>
|
2013-03-24 17:50:39 -06:00
|
|
|
#include <net/netns/netfilter.h>
|
2008-01-31 05:02:13 -07:00
|
|
|
#include <net/netns/x_tables.h>
|
2008-10-08 03:35:02 -06:00
|
|
|
#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
|
|
|
|
#include <net/netns/conntrack.h>
|
|
|
|
#endif
|
2013-10-10 15:28:33 -06:00
|
|
|
#include <net/netns/nftables.h>
|
2008-11-25 18:14:31 -07:00
|
|
|
#include <net/netns/xfrm.h>
|
2015-03-03 18:10:47 -07:00
|
|
|
#include <net/netns/mpls.h>
|
2014-10-31 20:56:04 -06:00
|
|
|
#include <linux/ns_common.h>
|
2015-06-17 09:28:25 -06:00
|
|
|
#include <linux/idr.h>
|
|
|
|
#include <linux/skbuff.h>
|
2007-12-11 05:19:17 -07:00
|
|
|
|
2012-06-14 03:31:10 -06:00
|
|
|
struct user_namespace;
|
2007-09-12 04:01:34 -06:00
|
|
|
struct proc_dir_entry;
|
2007-09-26 23:10:56 -06:00
|
|
|
struct net_device;
|
2007-11-19 23:26:51 -07:00
|
|
|
struct sock;
|
2007-12-01 05:51:01 -07:00
|
|
|
struct ctl_table_header;
|
2008-04-15 01:36:08 -06:00
|
|
|
struct net_generic;
|
2009-07-10 03:51:34 -06:00
|
|
|
struct sock;
|
2011-03-04 03:18:07 -07:00
|
|
|
struct netns_ipvs;
|
2007-12-01 05:51:01 -07:00
|
|
|
|
2009-10-24 07:13:17 -06:00
|
|
|
|
|
|
|
#define NETDEV_HASHBITS 8
|
|
|
|
#define NETDEV_HASHENTRIES (1 << NETDEV_HASHBITS)
|
|
|
|
|
2007-09-12 03:50:50 -06:00
|
|
|
struct net {
|
2011-06-08 19:13:01 -06:00
|
|
|
atomic_t passive; /* To decided when the network
|
|
|
|
* namespace should be freed.
|
|
|
|
*/
|
2007-09-12 03:50:50 -06:00
|
|
|
atomic_t count; /* To decided when the network
|
2011-06-08 19:13:01 -06:00
|
|
|
* namespace should be shut down.
|
2007-09-12 03:50:50 -06:00
|
|
|
*/
|
2010-10-13 23:56:18 -06:00
|
|
|
spinlock_t rules_mod_lock;
|
|
|
|
|
2015-03-11 19:53:14 -06:00
|
|
|
atomic64_t cookie_gen;
|
|
|
|
|
2007-09-12 03:50:50 -06:00
|
|
|
struct list_head list; /* list of network namespaces */
|
2009-11-29 15:25:27 -07:00
|
|
|
struct list_head cleanup_list; /* namespaces on death row */
|
2009-12-02 19:29:03 -07:00
|
|
|
struct list_head exit_list; /* Use only net_mutex */
|
2007-09-12 04:01:34 -06:00
|
|
|
|
2012-06-14 03:31:10 -06:00
|
|
|
struct user_namespace *user_ns; /* Owning user namespace */
|
2016-08-08 13:33:23 -06:00
|
|
|
struct ucounts *ucounts;
|
2015-05-15 15:47:32 -06:00
|
|
|
spinlock_t nsid_lock;
|
2015-01-15 07:11:15 -07:00
|
|
|
struct idr netns_ids;
|
2012-06-14 03:31:10 -06:00
|
|
|
|
2014-10-31 20:56:04 -06:00
|
|
|
struct ns_common ns;
|
2011-06-15 11:21:48 -06:00
|
|
|
|
2007-09-12 04:01:34 -06:00
|
|
|
struct proc_dir_entry *proc_net;
|
|
|
|
struct proc_dir_entry *proc_net_stat;
|
2007-09-17 12:56:21 -06:00
|
|
|
|
2008-07-14 19:22:20 -06:00
|
|
|
#ifdef CONFIG_SYSCTL
|
|
|
|
struct ctl_table_set sysctls;
|
|
|
|
#endif
|
2007-11-30 05:55:42 -07:00
|
|
|
|
2010-10-13 23:56:18 -06:00
|
|
|
struct sock *rtnl; /* rtnetlink socket */
|
|
|
|
struct sock *genl_sock;
|
2007-09-26 23:10:56 -06:00
|
|
|
|
2007-09-17 12:56:21 -06:00
|
|
|
struct list_head dev_base_head;
|
|
|
|
struct hlist_head *dev_name_head;
|
|
|
|
struct hlist_head *dev_index_head;
|
2011-06-20 21:11:20 -06:00
|
|
|
unsigned int dev_base_seq; /* protected by rtnl_mutex */
|
2012-08-08 15:53:19 -06:00
|
|
|
int ifindex;
|
2013-09-23 22:19:49 -06:00
|
|
|
unsigned int dev_unreg_count;
|
2007-11-19 23:26:51 -07:00
|
|
|
|
2008-01-10 04:20:28 -07:00
|
|
|
/* core fib_rules */
|
|
|
|
struct list_head rules_ops;
|
|
|
|
|
2007-11-19 23:28:35 -07:00
|
|
|
|
2010-10-13 23:56:18 -06:00
|
|
|
struct net_device *loopback_dev; /* The loopback */
|
2008-03-31 20:41:14 -06:00
|
|
|
struct netns_core core;
|
2008-07-18 05:01:24 -06:00
|
|
|
struct netns_mib mib;
|
2007-12-11 05:19:54 -07:00
|
|
|
struct netns_packet packet;
|
2007-12-11 05:19:17 -07:00
|
|
|
struct netns_unix unx;
|
2007-12-16 14:29:36 -07:00
|
|
|
struct netns_ipv4 ipv4;
|
2011-12-10 02:48:31 -07:00
|
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
2008-01-10 03:49:06 -07:00
|
|
|
struct netns_ipv6 ipv6;
|
|
|
|
#endif
|
2014-02-27 23:32:49 -07:00
|
|
|
#if IS_ENABLED(CONFIG_IEEE802154_6LOWPAN)
|
|
|
|
struct netns_ieee802154_lowpan ieee802154_lowpan;
|
|
|
|
#endif
|
2012-08-06 02:42:04 -06:00
|
|
|
#if defined(CONFIG_IP_SCTP) || defined(CONFIG_IP_SCTP_MODULE)
|
|
|
|
struct netns_sctp sctp;
|
|
|
|
#endif
|
2008-04-13 23:28:42 -06:00
|
|
|
#if defined(CONFIG_IP_DCCP) || defined(CONFIG_IP_DCCP_MODULE)
|
|
|
|
struct netns_dccp dccp;
|
|
|
|
#endif
|
2008-01-31 05:02:13 -07:00
|
|
|
#ifdef CONFIG_NETFILTER
|
2013-03-24 17:50:39 -06:00
|
|
|
struct netns_nf nf;
|
2008-01-31 05:02:13 -07:00
|
|
|
struct netns_xt xt;
|
2008-10-08 03:35:02 -06:00
|
|
|
#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
|
|
|
|
struct netns_ct ct;
|
2012-09-18 10:50:08 -06:00
|
|
|
#endif
|
2013-10-10 15:28:33 -06:00
|
|
|
#if defined(CONFIG_NF_TABLES) || defined(CONFIG_NF_TABLES_MODULE)
|
|
|
|
struct netns_nftables nft;
|
|
|
|
#endif
|
2012-09-18 10:50:08 -06:00
|
|
|
#if IS_ENABLED(CONFIG_NF_DEFRAG_IPV6)
|
|
|
|
struct netns_nf_frag nf_frag;
|
2008-10-08 03:35:02 -06:00
|
|
|
#endif
|
2010-01-13 08:02:14 -07:00
|
|
|
struct sock *nfnl;
|
|
|
|
struct sock *nfnl_stash;
|
2015-08-05 09:51:45 -06:00
|
|
|
#if IS_ENABLED(CONFIG_NETFILTER_NETLINK_ACCT)
|
|
|
|
struct list_head nfnl_acct_list;
|
|
|
|
#endif
|
2015-12-09 06:07:40 -07:00
|
|
|
#if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT)
|
|
|
|
struct list_head nfct_timeout_list;
|
|
|
|
#endif
|
2008-11-25 18:14:31 -07:00
|
|
|
#endif
|
2009-09-29 15:27:28 -06:00
|
|
|
#ifdef CONFIG_WEXT_CORE
|
2009-06-23 19:34:48 -06:00
|
|
|
struct sk_buff_head wext_nlevents;
|
2008-01-31 05:02:13 -07:00
|
|
|
#endif
|
2010-10-24 21:20:11 -06:00
|
|
|
struct net_generic __rcu *gen;
|
2010-10-13 23:56:18 -06:00
|
|
|
|
|
|
|
/* Note : following structs are cache line aligned */
|
|
|
|
#ifdef CONFIG_XFRM
|
|
|
|
struct netns_xfrm xfrm;
|
|
|
|
#endif
|
2013-06-26 02:40:06 -06:00
|
|
|
#if IS_ENABLED(CONFIG_IP_VS)
|
2011-01-03 06:44:42 -07:00
|
|
|
struct netns_ipvs *ipvs;
|
2015-03-03 18:10:47 -07:00
|
|
|
#endif
|
|
|
|
#if IS_ENABLED(CONFIG_MPLS)
|
|
|
|
struct netns_mpls mpls;
|
2013-06-26 02:40:06 -06:00
|
|
|
#endif
|
2012-07-15 22:28:49 -06:00
|
|
|
struct sock *diag_nlsk;
|
2013-05-27 14:46:33 -06:00
|
|
|
atomic_t fnhe_genid;
|
2007-09-12 03:50:50 -06:00
|
|
|
};
|
|
|
|
|
2008-04-02 01:10:28 -06:00
|
|
|
#include <linux/seq_file_net.h>
|
|
|
|
|
2007-09-13 01:16:29 -06:00
|
|
|
/* Init's network namespace */
|
2007-09-12 03:50:50 -06:00
|
|
|
extern struct net init_net;
|
2008-04-03 14:04:33 -06:00
|
|
|
|
2012-06-14 03:16:42 -06:00
|
|
|
#ifdef CONFIG_NET_NS
|
2013-09-21 11:22:48 -06:00
|
|
|
struct net *copy_net_ns(unsigned long flags, struct user_namespace *user_ns,
|
|
|
|
struct net *old_net);
|
2008-04-02 01:09:29 -06:00
|
|
|
|
2012-06-14 03:16:42 -06:00
|
|
|
#else /* CONFIG_NET_NS */
|
|
|
|
#include <linux/sched.h>
|
|
|
|
#include <linux/nsproxy.h>
|
2012-06-14 03:31:10 -06:00
|
|
|
static inline struct net *copy_net_ns(unsigned long flags,
|
|
|
|
struct user_namespace *user_ns, struct net *old_net)
|
2007-09-26 23:04:26 -06:00
|
|
|
{
|
2012-06-14 03:16:42 -06:00
|
|
|
if (flags & CLONE_NEWNET)
|
|
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
return old_net;
|
2007-09-26 23:04:26 -06:00
|
|
|
}
|
2012-06-14 03:16:42 -06:00
|
|
|
#endif /* CONFIG_NET_NS */
|
2008-04-02 01:09:29 -06:00
|
|
|
|
|
|
|
|
|
|
|
extern struct list_head net_namespace_list;
|
2007-09-26 23:04:26 -06:00
|
|
|
|
2013-09-21 11:22:48 -06:00
|
|
|
struct net *get_net_ns_by_pid(pid_t pid);
|
2016-11-18 02:41:46 -07:00
|
|
|
struct net *get_net_ns_by_fd(int fd);
|
2009-07-10 03:51:35 -06:00
|
|
|
|
2014-02-09 09:59:14 -07:00
|
|
|
#ifdef CONFIG_SYSCTL
|
|
|
|
void ipx_register_sysctl(void);
|
|
|
|
void ipx_unregister_sysctl(void);
|
|
|
|
#else
|
|
|
|
#define ipx_register_sysctl()
|
|
|
|
#define ipx_unregister_sysctl()
|
|
|
|
#endif
|
|
|
|
|
2007-11-01 01:43:49 -06:00
|
|
|
#ifdef CONFIG_NET_NS
|
2013-09-21 11:22:48 -06:00
|
|
|
void __put_net(struct net *net);
|
2007-09-12 03:50:50 -06:00
|
|
|
|
|
|
|
static inline struct net *get_net(struct net *net)
|
|
|
|
{
|
|
|
|
atomic_inc(&net->count);
|
|
|
|
return net;
|
|
|
|
}
|
|
|
|
|
2007-09-13 01:18:57 -06:00
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
2007-09-12 03:50:50 -06:00
|
|
|
static inline void put_net(struct net *net)
|
|
|
|
{
|
|
|
|
if (atomic_dec_and_test(&net->count))
|
|
|
|
__put_net(net);
|
|
|
|
}
|
|
|
|
|
2008-03-25 12:57:35 -06:00
|
|
|
static inline
|
|
|
|
int net_eq(const struct net *net1, const struct net *net2)
|
|
|
|
{
|
|
|
|
return net1 == net2;
|
|
|
|
}
|
2011-06-08 19:13:01 -06:00
|
|
|
|
2013-09-21 11:22:48 -06:00
|
|
|
void net_drop_ns(void *);
|
2011-06-08 19:13:01 -06:00
|
|
|
|
2007-11-01 01:43:49 -06:00
|
|
|
#else
|
2008-06-20 23:16:51 -06:00
|
|
|
|
2007-11-01 01:43:49 -06:00
|
|
|
static inline struct net *get_net(struct net *net)
|
|
|
|
{
|
|
|
|
return net;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline void put_net(struct net *net)
|
|
|
|
{
|
|
|
|
}
|
|
|
|
|
2008-04-16 02:58:04 -06:00
|
|
|
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;
|
|
|
|
}
|
2011-06-08 19:13:01 -06:00
|
|
|
|
|
|
|
#define net_drop_ns NULL
|
2008-04-16 02:58:04 -06:00
|
|
|
#endif
|
|
|
|
|
|
|
|
|
2015-03-11 22:06:44 -06:00
|
|
|
typedef struct {
|
2008-11-12 01:53:30 -07:00
|
|
|
#ifdef CONFIG_NET_NS
|
2015-03-11 22:06:44 -06:00
|
|
|
struct net *net;
|
|
|
|
#endif
|
|
|
|
} possible_net_t;
|
2008-11-12 01:53:30 -07:00
|
|
|
|
2015-03-11 22:06:44 -06:00
|
|
|
static inline void write_pnet(possible_net_t *pnet, struct net *net)
|
2008-11-12 01:53:30 -07:00
|
|
|
{
|
2015-03-11 22:06:44 -06:00
|
|
|
#ifdef CONFIG_NET_NS
|
|
|
|
pnet->net = net;
|
|
|
|
#endif
|
2008-11-12 01:53:30 -07:00
|
|
|
}
|
|
|
|
|
2015-03-11 22:06:44 -06:00
|
|
|
static inline struct net *read_pnet(const possible_net_t *pnet)
|
2008-11-12 01:53:30 -07:00
|
|
|
{
|
2015-03-11 22:06:44 -06:00
|
|
|
#ifdef CONFIG_NET_NS
|
|
|
|
return pnet->net;
|
2008-11-12 01:53:30 -07:00
|
|
|
#else
|
2015-03-11 22:06:44 -06:00
|
|
|
return &init_net;
|
2008-11-12 01:53:30 -07:00
|
|
|
#endif
|
2015-03-11 22:06:44 -06:00
|
|
|
}
|
2008-04-16 02:58:04 -06:00
|
|
|
|
2007-09-12 03:50:50 -06:00
|
|
|
#define for_each_net(VAR) \
|
|
|
|
list_for_each_entry(VAR, &net_namespace_list, list)
|
|
|
|
|
2009-07-10 03:51:33 -06:00
|
|
|
#define for_each_net_rcu(VAR) \
|
|
|
|
list_for_each_entry_rcu(VAR, &net_namespace_list, list)
|
|
|
|
|
2007-10-08 21:38:39 -06:00
|
|
|
#ifdef CONFIG_NET_NS
|
|
|
|
#define __net_init
|
|
|
|
#define __net_exit
|
2007-11-13 04:23:50 -07:00
|
|
|
#define __net_initdata
|
2012-10-04 18:12:11 -06:00
|
|
|
#define __net_initconst
|
2007-10-08 21:38:39 -06:00
|
|
|
#else
|
|
|
|
#define __net_init __init
|
2016-08-02 15:03:33 -06:00
|
|
|
#define __net_exit __ref
|
2007-11-13 04:23:50 -07:00
|
|
|
#define __net_initdata __initdata
|
2012-10-04 18:12:11 -06:00
|
|
|
#define __net_initconst __initconst
|
2007-10-08 21:38:39 -06:00
|
|
|
#endif
|
2007-09-12 03:50:50 -06:00
|
|
|
|
2015-05-07 03:02:49 -06:00
|
|
|
int peernet2id_alloc(struct net *net, struct net *peer);
|
2015-05-07 03:02:53 -06:00
|
|
|
int peernet2id(struct net *net, struct net *peer);
|
|
|
|
bool peernet_has_id(struct net *net, struct net *peer);
|
2015-01-15 07:11:15 -07:00
|
|
|
struct net *get_net_ns_by_id(struct net *net, int id);
|
|
|
|
|
2007-09-12 03:50:50 -06:00
|
|
|
struct pernet_operations {
|
|
|
|
struct list_head list;
|
|
|
|
int (*init)(struct net *net);
|
|
|
|
void (*exit)(struct net *net);
|
2009-12-02 19:29:03 -07:00
|
|
|
void (*exit_batch)(struct list_head *net_exit_list);
|
netns: make struct pernet_operations::id unsigned int
Make struct pernet_operations::id unsigned.
There are 2 reasons to do so:
1)
This field is really an index into an zero based array and
thus is unsigned entity. Using negative value is out-of-bound
access by definition.
2)
On x86_64 unsigned 32-bit data which are mixed with pointers
via array indexing or offsets added or subtracted to pointers
are preffered to signed 32-bit data.
"int" being used as an array index needs to be sign-extended
to 64-bit before being used.
void f(long *p, int i)
{
g(p[i]);
}
roughly translates to
movsx rsi, esi
mov rdi, [rsi+...]
call g
MOVSX is 3 byte instruction which isn't necessary if the variable is
unsigned because x86_64 is zero extending by default.
Now, there is net_generic() function which, you guessed it right, uses
"int" as an array index:
static inline void *net_generic(const struct net *net, int id)
{
...
ptr = ng->ptr[id - 1];
...
}
And this function is used a lot, so those sign extensions add up.
Patch snipes ~1730 bytes on allyesconfig kernel (without all junk
messing with code generation):
add/remove: 0/0 grow/shrink: 70/598 up/down: 396/-2126 (-1730)
Unfortunately some functions actually grow bigger.
This is a semmingly random artefact of code generation with register
allocator being used differently. gcc decides that some variable
needs to live in new r8+ registers and every access now requires REX
prefix. Or it is shifted into r12, so [r12+0] addressing mode has to be
used which is longer than [r8]
However, overall balance is in negative direction:
add/remove: 0/0 grow/shrink: 70/598 up/down: 396/-2126 (-1730)
function old new delta
nfsd4_lock 3886 3959 +73
tipc_link_build_proto_msg 1096 1140 +44
mac80211_hwsim_new_radio 2776 2808 +32
tipc_mon_rcv 1032 1058 +26
svcauth_gss_legacy_init 1413 1429 +16
tipc_bcbase_select_primary 379 392 +13
nfsd4_exchange_id 1247 1260 +13
nfsd4_setclientid_confirm 782 793 +11
...
put_client_renew_locked 494 480 -14
ip_set_sockfn_get 730 716 -14
geneve_sock_add 829 813 -16
nfsd4_sequence_done 721 703 -18
nlmclnt_lookup_host 708 686 -22
nfsd4_lockt 1085 1063 -22
nfs_get_client 1077 1050 -27
tcf_bpf_init 1106 1076 -30
nfsd4_encode_fattr 5997 5930 -67
Total: Before=154856051, After=154854321, chg -0.00%
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-11-16 18:58:21 -07:00
|
|
|
unsigned int *id;
|
2009-11-29 15:25:28 -07:00
|
|
|
size_t size;
|
2007-09-12 03:50:50 -06:00
|
|
|
};
|
|
|
|
|
2009-02-22 01:11:09 -07:00
|
|
|
/*
|
|
|
|
* 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.
|
|
|
|
*
|
2009-07-15 00:16:34 -06:00
|
|
|
* 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.
|
2009-02-22 01:11:09 -07:00
|
|
|
*
|
|
|
|
* 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.
|
|
|
|
*/
|
2013-09-21 11:22:48 -06:00
|
|
|
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 *);
|
2009-11-29 15:25:28 -07:00
|
|
|
|
2007-11-30 05:55:42 -07:00
|
|
|
struct ctl_table;
|
|
|
|
struct ctl_table_header;
|
2008-05-19 14:45:33 -06:00
|
|
|
|
2012-04-19 07:20:32 -06:00
|
|
|
#ifdef CONFIG_SYSCTL
|
2013-09-21 11:22:48 -06:00
|
|
|
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);
|
2012-04-23 06:13:02 -06:00
|
|
|
#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
|
|
|
|
|
2013-07-29 18:33:53 -06:00
|
|
|
static inline int rt_genid_ipv4(struct net *net)
|
2012-09-10 16:09:44 -06:00
|
|
|
{
|
2013-07-29 18:33:53 -06:00
|
|
|
return atomic_read(&net->ipv4.rt_genid);
|
2012-09-10 16:09:44 -06:00
|
|
|
}
|
|
|
|
|
2013-07-29 18:33:53 -06:00
|
|
|
static inline void rt_genid_bump_ipv4(struct net *net)
|
2012-09-10 16:09:44 -06:00
|
|
|
{
|
2013-07-29 18:33:53 -06:00
|
|
|
atomic_inc(&net->ipv4.rt_genid);
|
|
|
|
}
|
|
|
|
|
2014-09-27 16:46:06 -06:00
|
|
|
extern void (*__fib6_flush_trees)(struct net *net);
|
2013-07-29 18:33:53 -06:00
|
|
|
static inline void rt_genid_bump_ipv6(struct net *net)
|
|
|
|
{
|
2014-09-27 16:46:06 -06:00
|
|
|
if (__fib6_flush_trees)
|
|
|
|
__fib6_flush_trees(net);
|
2013-07-29 18:33:53 -06:00
|
|
|
}
|
|
|
|
|
2014-04-17 19:22:54 -06:00
|
|
|
#if IS_ENABLED(CONFIG_IEEE802154_6LOWPAN)
|
|
|
|
static inline struct netns_ieee802154_lowpan *
|
|
|
|
net_ieee802154_lowpan(struct net *net)
|
|
|
|
{
|
|
|
|
return &net->ieee802154_lowpan;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
2013-07-29 18:33:53 -06:00
|
|
|
/* 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);
|
2012-09-10 16:09:44 -06:00
|
|
|
}
|
2007-11-30 05:55:42 -07:00
|
|
|
|
2013-05-27 14:46:33 -06:00
|
|
|
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);
|
|
|
|
}
|
|
|
|
|
2007-09-12 03:50:50 -06:00
|
|
|
#endif /* __NET_NET_NAMESPACE_H */
|