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 <sys/stat.h>
12#include <linux/stddef.h>
13#include <linux/perf_event.h>
14#include <linux/refcount.h>
15#include <linux/types.h>
16
17#ifndef HAVE_SETNS_SUPPORT
18int setns(int fd, int nstype);
19#endif
20
21struct perf_record_namespaces;
22
23struct namespaces {
24	struct list_head list;
25	u64 end_time;
26	struct perf_ns_link_info link_info[];
27};
28
29struct namespaces *namespaces__new(struct perf_record_namespaces *event);
30void namespaces__free(struct namespaces *namespaces);
31
32struct nsinfo {
33	pid_t			pid;
34	pid_t			tgid;
35	pid_t			nstgid;
36	bool			need_setns;
37	bool			in_pidns;
38	char			*mntns_path;
39	refcount_t		refcnt;
40};
41
42struct nscookie {
43	int			oldns;
44	int			newns;
45	char			*oldcwd;
46};
47
48int nsinfo__init(struct nsinfo *nsi);
49struct nsinfo *nsinfo__new(pid_t pid);
50struct nsinfo *nsinfo__copy(const struct nsinfo *nsi);
51
52struct nsinfo *nsinfo__get(struct nsinfo *nsi);
53void nsinfo__put(struct nsinfo *nsi);
54
55bool nsinfo__need_setns(const struct nsinfo *nsi);
56void nsinfo__clear_need_setns(struct nsinfo *nsi);
57pid_t nsinfo__tgid(const struct nsinfo  *nsi);
58pid_t nsinfo__nstgid(const struct nsinfo  *nsi);
59pid_t nsinfo__pid(const struct nsinfo  *nsi);
60pid_t nsinfo__in_pidns(const struct nsinfo  *nsi);
61
62void nsinfo__mountns_enter(struct nsinfo *nsi, struct nscookie *nc);
63void nsinfo__mountns_exit(struct nscookie *nc);
64
65char *nsinfo__realpath(const char *path, struct nsinfo *nsi);
66int nsinfo__stat(const char *filename, struct stat *st, struct nsinfo *nsi);
67
68bool nsinfo__is_in_root_namespace(void);
69
70static inline void __nsinfo__zput(struct nsinfo **nsip)
71{
72	if (nsip) {
73		nsinfo__put(*nsip);
74		*nsip = NULL;
75	}
76}
77
78#define nsinfo__zput(nsi) __nsinfo__zput(&nsi)
79
80const char *perf_ns__name(unsigned int id);
81
82#endif  /* __PERF_NAMESPACES_H */