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authorKirill Korotaev2006-10-02 11:18:19 +0200
committerLinus Torvalds2006-10-02 16:57:22 +0200
commit25b21cb2f6d69b0475b134e0a3e8e269137270fa (patch)
treecd9c3966408c0ca5903249437c35ff35961de544 /kernel/nsproxy.c
parent[PATCH] uts: copy nsproxy only when needed (diff)
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[PATCH] IPC namespace core
This patch set allows to unshare IPCs and have a private set of IPC objects (sem, shm, msg) inside namespace. Basically, it is another building block of containers functionality. This patch implements core IPC namespace changes: - ipc_namespace structure - new config option CONFIG_IPC_NS - adds CLONE_NEWIPC flag - unshare support [clg@fr.ibm.com: small fix for unshare of ipc namespace] [akpm@osdl.org: build fix] Signed-off-by: Pavel Emelianov <xemul@openvz.org> Signed-off-by: Kirill Korotaev <dev@openvz.org> Signed-off-by: Cedric Le Goater <clg@fr.ibm.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel/nsproxy.c')
-rw-r--r--kernel/nsproxy.c41
1 files changed, 28 insertions, 13 deletions
diff --git a/kernel/nsproxy.c b/kernel/nsproxy.c
index 8246813335cc..8d6c852dc51e 100644
--- a/kernel/nsproxy.c
+++ b/kernel/nsproxy.c
@@ -7,6 +7,10 @@
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation, version 2 of the
* License.
+ *
+ * Jun 2006 - namespaces support
+ * OpenVZ, SWsoft Inc.
+ * Pavel Emelianov <xemul@openvz.org>
*/
#include <linux/module.h>
@@ -62,6 +66,8 @@ struct nsproxy *dup_namespaces(struct nsproxy *orig)
get_namespace(ns->namespace);
if (ns->uts_ns)
get_uts_ns(ns->uts_ns);
+ if (ns->ipc_ns)
+ get_ipc_ns(ns->ipc_ns);
}
return ns;
@@ -82,7 +88,7 @@ int copy_namespaces(int flags, struct task_struct *tsk)
get_nsproxy(old_ns);
- if (!(flags & (CLONE_NEWNS | CLONE_NEWUTS)))
+ if (!(flags & (CLONE_NEWNS | CLONE_NEWUTS | CLONE_NEWIPC)))
return 0;
new_ns = clone_namespaces(old_ns);
@@ -94,24 +100,31 @@ int copy_namespaces(int flags, struct task_struct *tsk)
tsk->nsproxy = new_ns;
err = copy_namespace(flags, tsk);
- if (err) {
- tsk->nsproxy = old_ns;
- put_nsproxy(new_ns);
- goto out;
- }
+ if (err)
+ goto out_ns;
err = copy_utsname(flags, tsk);
- if (err) {
- if (new_ns->namespace)
- put_namespace(new_ns->namespace);
- tsk->nsproxy = old_ns;
- put_nsproxy(new_ns);
- goto out;
- }
+ if (err)
+ goto out_uts;
+
+ err = copy_ipcs(flags, tsk);
+ if (err)
+ goto out_ipc;
out:
put_nsproxy(old_ns);
return err;
+
+out_ipc:
+ if (new_ns->uts_ns)
+ put_uts_ns(new_ns->uts_ns);
+out_uts:
+ if (new_ns->namespace)
+ put_namespace(new_ns->namespace);
+out_ns:
+ tsk->nsproxy = old_ns;
+ put_nsproxy(new_ns);
+ goto out;
}
void free_nsproxy(struct nsproxy *ns)
@@ -120,5 +133,7 @@ void free_nsproxy(struct nsproxy *ns)
put_namespace(ns->namespace);
if (ns->uts_ns)
put_uts_ns(ns->uts_ns);
+ if (ns->ipc_ns)
+ put_ipc_ns(ns->ipc_ns);
kfree(ns);
}