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 "../perf.h" 13 #include <linux/list.h> 14 #include <linux/refcount.h> 15 16 struct namespaces_event; 17 18 struct namespaces { 19 struct list_head list; 20 u64 end_time; 21 struct perf_ns_link_info link_info[]; 22 }; 23 24 struct namespaces *namespaces__new(struct namespaces_event *event); 25 void namespaces__free(struct namespaces *namespaces); 26 27 struct nsinfo { 28 pid_t pid; 29 pid_t tgid; 30 pid_t nstgid; 31 bool need_setns; 32 char *mntns_path; 33 refcount_t refcnt; 34 }; 35 36 struct nscookie { 37 int oldns; 38 int newns; 39 char *oldcwd; 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 __nsinfo__zput(struct nsinfo ** nsip)55static 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