1 /* 2 * This program is free software; you can redistribute it and/or modify 3 * it under the terms of the GNU General Public License, version 2, as 4 * published by the Free Software Foundation. 5 * 6 * Copyright (C) 2017 Hari Bathini, IBM Corporation 7 */ 8 9 #ifndef __PERF_NAMESPACES_H 10 #define __PERF_NAMESPACES_H 11 12 #include <sys/types.h> 13 #include <linux/perf_event.h> 14 #include <linux/refcount.h> 15 #include <linux/types.h> 16 17 struct namespaces_event; 18 19 struct namespaces { 20 struct list_head list; 21 u64 end_time; 22 struct perf_ns_link_info link_info[]; 23 }; 24 25 struct namespaces *namespaces__new(struct namespaces_event *event); 26 void namespaces__free(struct namespaces *namespaces); 27 28 struct nsinfo { 29 pid_t pid; 30 pid_t tgid; 31 pid_t nstgid; 32 bool need_setns; 33 char *mntns_path; 34 refcount_t refcnt; 35 }; 36 37 struct nscookie { 38 int oldns; 39 int newns; 40 }; 41 42 int nsinfo__init(struct nsinfo *nsi); 43 struct nsinfo *nsinfo__new(pid_t pid); 44 struct nsinfo *nsinfo__copy(struct nsinfo *nsi); 45 void nsinfo__delete(struct nsinfo *nsi); 46 47 struct nsinfo *nsinfo__get(struct nsinfo *nsi); 48 void nsinfo__put(struct nsinfo *nsi); 49 50 void nsinfo__mountns_enter(struct nsinfo *nsi, struct nscookie *nc); 51 void nsinfo__mountns_exit(struct nscookie *nc); 52 53 char *nsinfo__realpath(const char *path, struct nsinfo *nsi); 54 55 static inline void __nsinfo__zput(struct nsinfo **nsip) 56 { 57 if (nsip) { 58 nsinfo__put(*nsip); 59 *nsip = NULL; 60 } 61 } 62 63 #define nsinfo__zput(nsi) __nsinfo__zput(&nsi) 64 65 #endif /* __PERF_NAMESPACES_H */ 66