Merge tag 'block-5.9-2020-08-14' of git://git.kernel.dk/linux-block
[linux/fpc-iii.git] / tools / perf / util / namespaces.h
blob4b33f684eddd00f20cba42f05444cd48210711c8
1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
4 * Copyright (C) 2017 Hari Bathini, IBM Corporation
5 */
7 #ifndef __PERF_NAMESPACES_H
8 #define __PERF_NAMESPACES_H
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>
16 #ifndef HAVE_SETNS_SUPPORT
17 int setns(int fd, int nstype);
18 #endif
20 struct perf_record_namespaces;
22 struct namespaces {
23 struct list_head list;
24 u64 end_time;
25 struct perf_ns_link_info link_info[];
28 struct namespaces *namespaces__new(struct perf_record_namespaces *event);
29 void namespaces__free(struct namespaces *namespaces);
31 struct 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;
40 struct nscookie {
41 int oldns;
42 int newns;
43 char *oldcwd;
46 int nsinfo__init(struct nsinfo *nsi);
47 struct nsinfo *nsinfo__new(pid_t pid);
48 struct nsinfo *nsinfo__copy(struct nsinfo *nsi);
49 void nsinfo__delete(struct nsinfo *nsi);
51 struct nsinfo *nsinfo__get(struct nsinfo *nsi);
52 void nsinfo__put(struct nsinfo *nsi);
54 void nsinfo__mountns_enter(struct nsinfo *nsi, struct nscookie *nc);
55 void nsinfo__mountns_exit(struct nscookie *nc);
57 char *nsinfo__realpath(const char *path, struct nsinfo *nsi);
59 static inline void __nsinfo__zput(struct nsinfo **nsip)
61 if (nsip) {
62 nsinfo__put(*nsip);
63 *nsip = NULL;
67 #define nsinfo__zput(nsi) __nsinfo__zput(&nsi)
69 const char *perf_ns__name(unsigned int id);
71 #endif /* __PERF_NAMESPACES_H */