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