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ns proc: Add support for the ipc namespace 

Acked-by: Daniel Lezcano <daniel.lezcano@free.fr>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman 2010-03-07 18:48:39 -08:00
parent 34482e89a5
commit a00eaf11a2
3 changed files with 41 additions and 0 deletions
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3
fs/proc/namespaces.c
View File

@ -22,6 +22,9 @@ static const struct proc_ns_operations *ns_entries[] = {
#ifdef CONFIG_UTS_NS
&utsns_operations,
#endif
#ifdef CONFIG_IPC_NS
&ipcns_operations,
#endif
};
static const struct file_operations ns_file_operations = {

1
include/linux/proc_fs.h
View File

@ -267,6 +267,7 @@ struct proc_ns_operations {
};
extern const struct proc_ns_operations netns_operations;
extern const struct proc_ns_operations utsns_operations;
extern const struct proc_ns_operations ipcns_operations;
union proc_op {
int (*proc_get_link)(struct inode *, struct path *);

37
ipc/namespace.c
View File

@ -12,6 +12,7 @@
#include <linux/fs.h>
#include <linux/mount.h>
#include <linux/user_namespace.h>
#include <linux/proc_fs.h>
#include "util.h"
@ -140,3 +141,39 @@ void put_ipc_ns(struct ipc_namespace *ns)
free_ipc_ns(ns);
}
}
static void *ipcns_get(struct task_struct *task)
{
struct ipc_namespace *ns = NULL;
struct nsproxy *nsproxy;
rcu_read_lock();
nsproxy = task_nsproxy(task);
if (nsproxy)
ns = get_ipc_ns(nsproxy->ipc_ns);
rcu_read_unlock();
return ns;
}
static void ipcns_put(void *ns)
{
return put_ipc_ns(ns);
}
static int ipcns_install(struct nsproxy *nsproxy, void *ns)
{
/* Ditch state from the old ipc namespace */
exit_sem(current);
put_ipc_ns(nsproxy->ipc_ns);
nsproxy->ipc_ns = get_ipc_ns(ns);
return 0;
}
const struct proc_ns_operations ipcns_operations = {
.name = "ipc",
.type = CLONE_NEWIPC,
.get = ipcns_get,
.put = ipcns_put,
.install = ipcns_install,
};