#include <linux/spinlock.h>
#include <linux/sched.h>
-struct namespace;
+struct mnt_namespace;
struct uts_namespace;
struct ipc_namespace;
+struct pid_namespace;
/*
* A structure to contain pointers to all per-process
spinlock_t nslock;
struct uts_namespace *uts_ns;
struct ipc_namespace *ipc_ns;
- struct namespace *namespace;
+ struct mnt_namespace *mnt_ns;
+ struct pid_namespace *pid_ns;
};
extern struct nsproxy init_nsproxy;
int copy_namespaces(int flags, struct task_struct *tsk);
void get_task_namespaces(struct task_struct *tsk);
void free_nsproxy(struct nsproxy *ns);
+struct nsproxy *put_nsproxy(struct nsproxy *ns);
-static inline void put_nsproxy(struct nsproxy *ns)
+static inline void finalize_put_nsproxy(struct nsproxy *ns)
{
- if (atomic_dec_and_test(&ns->count)) {
+ if (ns)
free_nsproxy(ns);
- }
}
-static inline void exit_task_namespaces(struct task_struct *p)
+static inline void put_and_finalize_nsproxy(struct nsproxy *ns)
{
- struct nsproxy *ns = p->nsproxy;
- if (ns) {
- put_nsproxy(ns);
- p->nsproxy = NULL;
- }
+ finalize_put_nsproxy(put_nsproxy(ns));
+}
+
+static inline struct nsproxy *preexit_task_namespaces(struct task_struct *p)
+{
+ return put_nsproxy(p->nsproxy);
+}
+
+static inline void exit_task_namespaces(struct task_struct *p,
+ struct nsproxy *ns)
+{
+ task_lock(p);
+ p->nsproxy = NULL;
+ task_unlock(p);
+ finalize_put_nsproxy(ns);
}
#endif