1 /* SPDX-License-Identifier: GPL-2.0-only */ 1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /* 2 /*
3 * 3 *
4 * Copyright (C) 2017 Hari Bathini, IBM Corpor 4 * Copyright (C) 2017 Hari Bathini, IBM Corporation
5 */ 5 */
6 6
7 #ifndef __PERF_NAMESPACES_H 7 #ifndef __PERF_NAMESPACES_H
8 #define __PERF_NAMESPACES_H 8 #define __PERF_NAMESPACES_H
9 9
10 #include <sys/types.h> 10 #include <sys/types.h>
11 #include <sys/stat.h> 11 #include <sys/stat.h>
12 #include <linux/stddef.h> 12 #include <linux/stddef.h>
13 #include <linux/perf_event.h> 13 #include <linux/perf_event.h>
14 #include <linux/refcount.h> 14 #include <linux/refcount.h>
15 #include <linux/types.h> 15 #include <linux/types.h>
16 #include <internal/rc_check.h> <<
17 16
18 #ifndef HAVE_SETNS_SUPPORT 17 #ifndef HAVE_SETNS_SUPPORT
19 int setns(int fd, int nstype); 18 int setns(int fd, int nstype);
20 #endif 19 #endif
21 20
22 struct perf_record_namespaces; 21 struct perf_record_namespaces;
23 22
24 struct namespaces { 23 struct namespaces {
25 struct list_head list; 24 struct list_head list;
26 u64 end_time; 25 u64 end_time;
27 struct perf_ns_link_info link_info[]; 26 struct perf_ns_link_info link_info[];
28 }; 27 };
29 28
30 struct namespaces *namespaces__new(struct perf 29 struct namespaces *namespaces__new(struct perf_record_namespaces *event);
31 void namespaces__free(struct namespaces *names 30 void namespaces__free(struct namespaces *namespaces);
32 31
33 DECLARE_RC_STRUCT(nsinfo) { !! 32 struct nsinfo {
34 pid_t pid; 33 pid_t pid;
35 pid_t tgid; 34 pid_t tgid;
36 pid_t nstgid; 35 pid_t nstgid;
37 bool need_setns; 36 bool need_setns;
38 bool in_pidns; 37 bool in_pidns;
39 char *mntns_path; 38 char *mntns_path;
40 refcount_t refcnt; 39 refcount_t refcnt;
41 }; 40 };
42 41
43 struct nscookie { 42 struct nscookie {
44 int oldns; 43 int oldns;
45 int newns; 44 int newns;
46 char *oldcwd; 45 char *oldcwd;
47 }; 46 };
48 47
49 int nsinfo__init(struct nsinfo *nsi); 48 int nsinfo__init(struct nsinfo *nsi);
50 struct nsinfo *nsinfo__new(pid_t pid); 49 struct nsinfo *nsinfo__new(pid_t pid);
51 struct nsinfo *nsinfo__copy(const struct nsinf 50 struct nsinfo *nsinfo__copy(const struct nsinfo *nsi);
52 51
53 struct nsinfo *nsinfo__get(struct nsinfo *nsi) 52 struct nsinfo *nsinfo__get(struct nsinfo *nsi);
54 void nsinfo__put(struct nsinfo *nsi); 53 void nsinfo__put(struct nsinfo *nsi);
55 54
56 bool nsinfo__need_setns(const struct nsinfo *n 55 bool nsinfo__need_setns(const struct nsinfo *nsi);
57 void nsinfo__clear_need_setns(struct nsinfo *n 56 void nsinfo__clear_need_setns(struct nsinfo *nsi);
58 pid_t nsinfo__tgid(const struct nsinfo *nsi); 57 pid_t nsinfo__tgid(const struct nsinfo *nsi);
59 pid_t nsinfo__nstgid(const struct nsinfo *nsi 58 pid_t nsinfo__nstgid(const struct nsinfo *nsi);
60 pid_t nsinfo__pid(const struct nsinfo *nsi); 59 pid_t nsinfo__pid(const struct nsinfo *nsi);
61 pid_t nsinfo__in_pidns(const struct nsinfo *n 60 pid_t nsinfo__in_pidns(const struct nsinfo *nsi);
62 61
63 void nsinfo__mountns_enter(struct nsinfo *nsi, 62 void nsinfo__mountns_enter(struct nsinfo *nsi, struct nscookie *nc);
64 void nsinfo__mountns_exit(struct nscookie *nc) 63 void nsinfo__mountns_exit(struct nscookie *nc);
65 64
66 char *nsinfo__realpath(const char *path, struc 65 char *nsinfo__realpath(const char *path, struct nsinfo *nsi);
67 int nsinfo__stat(const char *filename, struct 66 int nsinfo__stat(const char *filename, struct stat *st, struct nsinfo *nsi);
68 67
69 bool nsinfo__is_in_root_namespace(void); 68 bool nsinfo__is_in_root_namespace(void);
70 69
71 static inline void __nsinfo__zput(struct nsinf 70 static inline void __nsinfo__zput(struct nsinfo **nsip)
72 { 71 {
73 if (nsip) { 72 if (nsip) {
74 nsinfo__put(*nsip); 73 nsinfo__put(*nsip);
75 *nsip = NULL; 74 *nsip = NULL;
76 } 75 }
77 } 76 }
78 77
79 #define nsinfo__zput(nsi) __nsinfo__zput(&nsi) 78 #define nsinfo__zput(nsi) __nsinfo__zput(&nsi)
80 79
81 const char *perf_ns__name(unsigned int id); 80 const char *perf_ns__name(unsigned int id);
82 81
83 #endif /* __PERF_NAMESPACES_H */ 82 #endif /* __PERF_NAMESPACES_H */
84 83
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