projects/linux·blob master · refs

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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#include <internal/rc_check.h>
17
18#ifndef HAVE_SETNS_SUPPORT
19int setns(int fd, int nstype);
20#endif
21
22struct perf_record_namespaces;
23
24struct namespaces {
25 struct list_head list;
26 u64 end_time;
27 struct perf_ns_link_info link_info[];
28};
29
30struct namespaces *namespaces__new(struct perf_record_namespaces *event);
31void namespaces__free(struct namespaces *namespaces);
32
33DECLARE_RC_STRUCT(nsinfo) {
34 pid_t pid;
35 pid_t tgid;
36 pid_t nstgid;
37 bool need_setns;
38 bool in_pidns;
39 char *mntns_path;
40 refcount_t refcnt;
41};
42
43struct nscookie {
44 int oldns;
45 int newns;
46 char *oldcwd;
47};
48
49int nsinfo__init(struct nsinfo *nsi);
50struct nsinfo *nsinfo__new(pid_t pid);
51struct nsinfo *nsinfo__copy(const struct nsinfo *nsi);
52
53struct nsinfo *nsinfo__get(struct nsinfo *nsi);
54void nsinfo__put(struct nsinfo *nsi);
55
56bool nsinfo__need_setns(const struct nsinfo *nsi);
57void nsinfo__clear_need_setns(struct nsinfo *nsi);
58pid_t nsinfo__tgid(const struct nsinfo *nsi);
59pid_t nsinfo__nstgid(const struct nsinfo *nsi);
60pid_t nsinfo__pid(const struct nsinfo *nsi);
61bool nsinfo__in_pidns(const struct nsinfo *nsi);
62void nsinfo__set_in_pidns(struct nsinfo *nsi);
63
64void nsinfo__mountns_enter(struct nsinfo *nsi, struct nscookie *nc);
65void nsinfo__mountns_exit(struct nscookie *nc);
66
67char *nsinfo__realpath(const char *path, struct nsinfo *nsi);
68int nsinfo__stat(const char *filename, struct stat *st, struct nsinfo *nsi);
69
70bool nsinfo__is_in_root_namespace(void);
71
72static inline void __nsinfo__zput(struct nsinfo **nsip)
73{
74 if (nsip) {
75 nsinfo__put(*nsip);
76 *nsip = NULL;
77 }
78}
79
80#define nsinfo__zput(nsi) __nsinfo__zput(&nsi)
81
82const char *perf_ns__name(unsigned int id);
83
84#endif /* __PERF_NAMESPACES_H */