diff options
author | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-12 06:40:14 +0400 |
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committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-12 06:40:14 +0400 |
commit | 038a5008b2f395c85e6e71d6ddf3c684e7c405b0 (patch) | |
tree | 4735eab577e97e5a22c3141e3f60071c8065585e /include/net/net_namespace.h | |
parent | dd6d1844af33acb4edd0a40b1770d091a22c94be (diff) | |
parent | 266918303226cceac7eca38ced30f15f277bd89c (diff) | |
download | linux-038a5008b2f395c85e6e71d6ddf3c684e7c405b0.tar.xz |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
* 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (867 commits)
[SKY2]: status polling loop (post merge)
[NET]: Fix NAPI completion handling in some drivers.
[TCP]: Limit processing lost_retrans loop to work-to-do cases
[TCP]: Fix lost_retrans loop vs fastpath problems
[TCP]: No need to re-count fackets_out/sacked_out at RTO
[TCP]: Extract tcp_match_queue_to_sack from sacktag code
[TCP]: Kill almost unused variable pcount from sacktag
[TCP]: Fix mark_head_lost to ignore R-bit when trying to mark L
[TCP]: Add bytes_acked (ABC) clearing to FRTO too
[IPv6]: Update setsockopt(IPV6_MULTICAST_IF) to support RFC 3493, try2
[NETFILTER]: x_tables: add missing ip6t_modulename aliases
[NETFILTER]: nf_conntrack_tcp: fix connection reopening
[QETH]: fix qeth_main.c
[NETLINK]: fib_frontend build fixes
[IPv6]: Export userland ND options through netlink (RDNSS support)
[9P]: build fix with !CONFIG_SYSCTL
[NET]: Fix dev_put() and dev_hold() comments
[NET]: make netlink user -> kernel interface synchronious
[NET]: unify netlink kernel socket recognition
[NET]: cleanup 3rd argument in netlink_sendskb
...
Fix up conflicts manually in Documentation/feature-removal-schedule.txt
and my new least favourite crap, the "mod_devicetable" support in the
files include/linux/mod_devicetable.h and scripts/mod/file2alias.c.
(The latter files seem to be explicitly _designed_ to get conflicts when
different subsystems work with them - that have an absolutely horrid
lack of subsystem separation!)
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/net/net_namespace.h')
-rw-r--r-- | include/net/net_namespace.h | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h new file mode 100644 index 000000000000..93aa87d32804 --- /dev/null +++ b/include/net/net_namespace.h @@ -0,0 +1,123 @@ +/* + * Operations on the network namespace + */ +#ifndef __NET_NET_NAMESPACE_H +#define __NET_NET_NAMESPACE_H + +#include <asm/atomic.h> +#include <linux/workqueue.h> +#include <linux/list.h> + +struct proc_dir_entry; +struct net_device; +struct net { + atomic_t count; /* To decided when the network + * namespace should be freed. + */ + atomic_t use_count; /* To track references we + * destroy on demand + */ + struct list_head list; /* list of network namespaces */ + struct work_struct work; /* work struct for freeing */ + + struct proc_dir_entry *proc_net; + struct proc_dir_entry *proc_net_stat; + struct proc_dir_entry *proc_net_root; + + struct net_device *loopback_dev; /* The loopback */ + + struct list_head dev_base_head; + struct hlist_head *dev_name_head; + struct hlist_head *dev_index_head; +}; + +#ifdef CONFIG_NET +/* Init's network namespace */ +extern struct net init_net; +#define INIT_NET_NS(net_ns) .net_ns = &init_net, +#else +#define INIT_NET_NS(net_ns) +#endif + +extern struct list_head net_namespace_list; + +#ifdef CONFIG_NET +extern struct net *copy_net_ns(unsigned long flags, struct net *net_ns); +#else +static inline struct net *copy_net_ns(unsigned long flags, struct net *net_ns) +{ + /* There is nothing to copy so this is a noop */ + return net_ns; +} +#endif + +extern void __put_net(struct net *net); + +static inline struct net *get_net(struct net *net) +{ +#ifdef CONFIG_NET + atomic_inc(&net->count); +#endif + 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) +{ +#ifdef CONFIG_NET + if (atomic_dec_and_test(&net->count)) + __put_net(net); +#endif +} + +static inline struct net *hold_net(struct net *net) +{ +#ifdef CONFIG_NET + atomic_inc(&net->use_count); +#endif + return net; +} + +static inline void release_net(struct net *net) +{ +#ifdef CONFIG_NET + atomic_dec(&net->use_count); +#endif +} + +#define for_each_net(VAR) \ + list_for_each_entry(VAR, &net_namespace_list, list) + +#ifdef CONFIG_NET_NS +#define __net_init +#define __net_exit +#define __net_initdata +#else +#define __net_init __init +#define __net_exit __exit_refok +#define __net_initdata __initdata +#endif + +struct pernet_operations { + struct list_head list; + int (*init)(struct net *net); + void (*exit)(struct net *net); +}; + +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 *); + +#endif /* __NET_NET_NAMESPACE_H */ |