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-rw-r--r--include/linux/cgroup.h3
-rw-r--r--include/linux/nsproxy.h7
-rw-r--r--kernel/cgroup.c7
-rw-r--r--kernel/fork.c6
-rw-r--r--kernel/ns_cgroup.c8
-rw-r--r--kernel/nsproxy.c8
6 files changed, 23 insertions, 16 deletions
diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
index cc59d3a..c98dd7c 100644
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -364,7 +364,8 @@ static inline struct cgroup* task_cgroup(struct task_struct *task,
return task_subsys_state(task, subsys_id)->cgroup;
}
-int cgroup_clone(struct task_struct *tsk, struct cgroup_subsys *ss);
+int cgroup_clone(struct task_struct *tsk, struct cgroup_subsys *ss,
+ char *nodename);
/* A cgroup_iter should be treated as an opaque object */
struct cgroup_iter {
diff --git a/include/linux/nsproxy.h b/include/linux/nsproxy.h
index 0e66b57..c8a768e 100644
--- a/include/linux/nsproxy.h
+++ b/include/linux/nsproxy.h
@@ -82,9 +82,12 @@ static inline void get_nsproxy(struct nsproxy *ns)
}
#ifdef CONFIG_CGROUP_NS
-int ns_cgroup_clone(struct task_struct *tsk);
+int ns_cgroup_clone(struct task_struct *tsk, struct pid *pid);
#else
-static inline int ns_cgroup_clone(struct task_struct *tsk) { return 0; }
+static inline int ns_cgroup_clone(struct task_struct *tsk, struct pid *pid)
+{
+ return 0;
+}
#endif
#endif
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 86b71e7..66ec9fd 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -2848,16 +2848,17 @@ void cgroup_exit(struct task_struct *tsk, int run_callbacks)
* cgroup_clone - clone the cgroup the given subsystem is attached to
* @tsk: the task to be moved
* @subsys: the given subsystem
+ * @nodename: the name for the new cgroup
*
* Duplicate the current cgroup in the hierarchy that the given
* subsystem is attached to, and move this task into the new
* child.
*/
-int cgroup_clone(struct task_struct *tsk, struct cgroup_subsys *subsys)
+int cgroup_clone(struct task_struct *tsk, struct cgroup_subsys *subsys,
+ char *nodename)
{
struct dentry *dentry;
int ret = 0;
- char nodename[MAX_CGROUP_TYPE_NAMELEN];
struct cgroup *parent, *child;
struct inode *inode;
struct css_set *cg;
@@ -2882,8 +2883,6 @@ int cgroup_clone(struct task_struct *tsk, struct cgroup_subsys *subsys)
cg = tsk->cgroups;
parent = task_cgroup(tsk, subsys->subsys_id);
- snprintf(nodename, MAX_CGROUP_TYPE_NAMELEN, "%d", tsk->pid);
-
/* Pin the hierarchy */
atomic_inc(&parent->root->sb->s_active);
diff --git a/kernel/fork.c b/kernel/fork.c
index 5a5d6fe..228f80c 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1107,6 +1107,12 @@ static struct task_struct *copy_process(unsigned long clone_flags,
if (clone_flags & CLONE_THREAD)
p->tgid = current->tgid;
+ if (current->nsproxy != p->nsproxy) {
+ retval = ns_cgroup_clone(p, pid);
+ if (retval)
+ goto bad_fork_free_pid;
+ }
+
p->set_child_tid = (clone_flags & CLONE_CHILD_SETTID) ? child_tidptr : NULL;
/*
* Clear TID on mm_release()?
diff --git a/kernel/ns_cgroup.c b/kernel/ns_cgroup.c
index 48d7ed6..43c2111 100644
--- a/kernel/ns_cgroup.c
+++ b/kernel/ns_cgroup.c
@@ -7,6 +7,7 @@
#include <linux/module.h>
#include <linux/cgroup.h>
#include <linux/fs.h>
+#include <linux/proc_fs.h>
#include <linux/slab.h>
#include <linux/nsproxy.h>
@@ -24,9 +25,12 @@ static inline struct ns_cgroup *cgroup_to_ns(
struct ns_cgroup, css);
}
-int ns_cgroup_clone(struct task_struct *task)
+int ns_cgroup_clone(struct task_struct *task, struct pid *pid)
{
- return cgroup_clone(task, &ns_subsys);
+ char name[PROC_NUMBUF];
+
+ snprintf(name, PROC_NUMBUF, "%d", pid_vnr(pid));
+ return cgroup_clone(task, &ns_subsys, name);
}
/*
diff --git a/kernel/nsproxy.c b/kernel/nsproxy.c
index adc7851..21575fc 100644
--- a/kernel/nsproxy.c
+++ b/kernel/nsproxy.c
@@ -157,12 +157,6 @@ int copy_namespaces(unsigned long flags, struct task_struct *tsk)
goto out;
}
- err = ns_cgroup_clone(tsk);
- if (err) {
- put_nsproxy(new_ns);
- goto out;
- }
-
tsk->nsproxy = new_ns;
out:
@@ -209,7 +203,7 @@ int unshare_nsproxy_namespaces(unsigned long unshare_flags,
goto out;
}
- err = ns_cgroup_clone(current);
+ err = ns_cgroup_clone(current, task_pid(current));
if (err)
put_nsproxy(*new_nsp);