1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 *
 4 * Copyright (C) 2017 Hari Bathini, IBM Corporation
 5 */
 6
 7#ifndef __PERF_NAMESPACES_H
 8#define __PERF_NAMESPACES_H
 9
10#include <sys/types.h>
11#include <linux/stddef.h>
12#include <linux/perf_event.h>
13#include <linux/refcount.h>
14#include <linux/types.h>
15
16#ifndef HAVE_SETNS_SUPPORT
17int setns(int fd, int nstype);
18#endif
19
20struct perf_record_namespaces;
21
22struct namespaces {
23	struct list_head list;
24	u64 end_time;
25	struct perf_ns_link_info link_info[];
26};
27
28struct namespaces *namespaces__new(struct perf_record_namespaces *event);
29void namespaces__free(struct namespaces *namespaces);
30
31struct nsinfo {
32	pid_t			pid;
33	pid_t			tgid;
34	pid_t			nstgid;
35	bool			need_setns;
36	char			*mntns_path;
37	refcount_t		refcnt;
38};
39
40struct nscookie {
41	int			oldns;
42	int			newns;
43	char			*oldcwd;
44};
45
46int nsinfo__init(struct nsinfo *nsi);
47struct nsinfo *nsinfo__new(pid_t pid);
48struct nsinfo *nsinfo__copy(struct nsinfo *nsi);
49void nsinfo__delete(struct nsinfo *nsi);
50
51struct nsinfo *nsinfo__get(struct nsinfo *nsi);
52void nsinfo__put(struct nsinfo *nsi);
53
54void nsinfo__mountns_enter(struct nsinfo *nsi, struct nscookie *nc);
55void nsinfo__mountns_exit(struct nscookie *nc);
56
57char *nsinfo__realpath(const char *path, struct nsinfo *nsi);
58
59static inline void __nsinfo__zput(struct nsinfo **nsip)
60{
61	if (nsip) {
62		nsinfo__put(*nsip);
63		*nsip = NULL;
64	}
65}
66
67#define nsinfo__zput(nsi) __nsinfo__zput(&nsi)
68
69const char *perf_ns__name(unsigned int id);
70
71#endif  /* __PERF_NAMESPACES_H */