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/stddef.h> 14 #include <linux/perf_event.h> 15 #include <linux/refcount.h> 16 #include <linux/types.h> 17 18 struct namespaces_event; 19 20 struct namespaces { 21 struct list_head list; 22 u64 end_time; 23 struct perf_ns_link_info link_info[]; 24 }; 25 26 struct namespaces *namespaces__new(struct namespaces_event *event); 27 void namespaces__free(struct namespaces *namespaces); 28 29 struct nsinfo { 30 pid_t pid; 31 pid_t tgid; 32 pid_t nstgid; 33 bool need_setns; 34 char *mntns_path; 35 refcount_t refcnt; 36 }; 37 38 struct nscookie { 39 int oldns; 40 int newns; 41 char *oldcwd; 42 }; 43 44 int nsinfo__init(struct nsinfo *nsi); 45 struct nsinfo *nsinfo__new(pid_t pid); 46 struct nsinfo *nsinfo__copy(struct nsinfo *nsi); 47 void nsinfo__delete(struct nsinfo *nsi); 48 49 struct nsinfo *nsinfo__get(struct nsinfo *nsi); 50 void nsinfo__put(struct nsinfo *nsi); 51 52 void nsinfo__mountns_enter(struct nsinfo *nsi, struct nscookie *nc); 53 void nsinfo__mountns_exit(struct nscookie *nc); 54 55 char *nsinfo__realpath(const char *path, struct nsinfo *nsi); 56 57 static inline void __nsinfo__zput(struct nsinfo **nsip) 58 { 59 if (nsip) { 60 nsinfo__put(*nsip); 61 *nsip = NULL; 62 } 63 } 64 65 #define nsinfo__zput(nsi) __nsinfo__zput(&nsi) 66 67 #endif /* __PERF_NAMESPACES_H */ 68