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| author | Eric W. Biederman <ebiederm@xmission.com> | 2010-03-07 18:14:23 -0800 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2011-05-10 14:34:26 -0700 |
| commit | 13b6f57623bc485e116344fe91fbcb29f149242b (patch) | |
| tree | f2d43576e248ac61b967734a6ccd313b971fb430 | |
| parent | 0663c6f8fa37d777ede74ff991a0cba3a42fcbd7 (diff) | |
| download | linux-13b6f57623bc485e116344fe91fbcb29f149242b.tar.gz linux-13b6f57623bc485e116344fe91fbcb29f149242b.tar.bz2 linux-13b6f57623bc485e116344fe91fbcb29f149242b.zip | |
ns proc: Add support for the network namespace.
Implementing file descriptors for the network namespace
is simple and straight forward.
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Daniel Lezcano <daniel.lezcano@free.fr>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
| -rw-r--r-- | fs/proc/namespaces.c | 3 | ||||
| -rw-r--r-- | include/linux/proc_fs.h | 1 | ||||
| -rw-r--r-- | net/core/net_namespace.c | 31 |
3 files changed, 35 insertions, 0 deletions
diff --git a/fs/proc/namespaces.c b/fs/proc/namespaces.c index 6ae9f07d59ee..dcbd483e9915 100644 --- a/fs/proc/namespaces.c +++ b/fs/proc/namespaces.c @@ -16,6 +16,9 @@ static const struct proc_ns_operations *ns_entries[] = { +#ifdef CONFIG_NET_NS + &netns_operations, +#endif }; static const struct file_operations ns_file_operations = { diff --git a/include/linux/proc_fs.h b/include/linux/proc_fs.h index a6d2c6da5e5a..62126ec6ede9 100644 --- a/include/linux/proc_fs.h +++ b/include/linux/proc_fs.h @@ -265,6 +265,7 @@ struct proc_ns_operations { void (*put)(void *ns); int (*install)(struct nsproxy *nsproxy, void *ns); }; +extern const struct proc_ns_operations netns_operations; union proc_op { int (*proc_get_link)(struct inode *, struct path *); diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c index 3f860261c5ee..bf7707e09a80 100644 --- a/net/core/net_namespace.c +++ b/net/core/net_namespace.c @@ -573,3 +573,34 @@ void unregister_pernet_device(struct pernet_operations *ops) mutex_unlock(&net_mutex); } EXPORT_SYMBOL_GPL(unregister_pernet_device); + +#ifdef CONFIG_NET_NS +static void *netns_get(struct task_struct *task) +{ + struct net *net; + rcu_read_lock(); + net = get_net(task->nsproxy->net_ns); + rcu_read_unlock(); + return net; +} + +static void netns_put(void *ns) +{ + put_net(ns); +} + +static int netns_install(struct nsproxy *nsproxy, void *ns) +{ + put_net(nsproxy->net_ns); + nsproxy->net_ns = get_net(ns); + return 0; +} + +const struct proc_ns_operations netns_operations = { + .name = "net", + .type = CLONE_NEWNET, + .get = netns_get, + .put = netns_put, + .install = netns_install, +}; +#endif |