1/*
 2 * This program is free software; you can redistribute it and/or modify
 3 * it under the terms of the GNU General Public License, version 2, as
 4 * published by the Free Software Foundation.
 5 *
 6 * Copyright (C) 2017 Hari Bathini, IBM Corporation
 7 */
 8
 9#ifndef __PERF_NAMESPACES_H
10#define __PERF_NAMESPACES_H
11
12#include <sys/types.h>
13#include <linux/perf_event.h>
14#include <linux/refcount.h>
15#include <linux/types.h>
16
17struct namespaces_event;
18
19struct namespaces {
20	struct list_head list;
21	u64 end_time;
22	struct perf_ns_link_info link_info[];
23};
24
25struct namespaces *namespaces__new(struct namespaces_event *event);
26void namespaces__free(struct namespaces *namespaces);
27
28struct nsinfo {
29	pid_t			pid;
30	pid_t			tgid;
31	pid_t			nstgid;
32	bool			need_setns;
33	char			*mntns_path;
34	refcount_t		refcnt;
35};
36
37struct nscookie {
38	int			oldns;
39	int			newns;
40};
41
42int nsinfo__init(struct nsinfo *nsi);
43struct nsinfo *nsinfo__new(pid_t pid);
44struct nsinfo *nsinfo__copy(struct nsinfo *nsi);
45void nsinfo__delete(struct nsinfo *nsi);
46
47struct nsinfo *nsinfo__get(struct nsinfo *nsi);
48void nsinfo__put(struct nsinfo *nsi);
49
50void nsinfo__mountns_enter(struct nsinfo *nsi, struct nscookie *nc);
51void nsinfo__mountns_exit(struct nscookie *nc);
52
53char *nsinfo__realpath(const char *path, struct nsinfo *nsi);
54
55static inline void __nsinfo__zput(struct nsinfo **nsip)
56{
57	if (nsip) {
58		nsinfo__put(*nsip);
59		*nsip = NULL;
60	}
61}
62
63#define nsinfo__zput(nsi) __nsinfo__zput(&nsi)
64
65#endif  /* __PERF_NAMESPACES_H */