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 17 #ifndef HAVE_SETNS_SUPPORT 18 int setns(int fd, int nstype); 19 #endif 20 21 struct perf_record_namespaces; 22 23 struct namespaces { 24 struct list_head list; 25 u64 end_time; 26 struct perf_ns_link_info link_info[]; 27 }; 28 29 struct namespaces *namespaces__new(struct perf_record_namespaces *event); 30 void namespaces__free(struct namespaces *namespaces); 31 32 struct nsinfo { 33 pid_t pid; 34 pid_t tgid; 35 pid_t nstgid; 36 bool need_setns; 37 bool in_pidns; 38 char *mntns_path; 39 refcount_t refcnt; 40 }; 41 42 struct nscookie { 43 int oldns; 44 int newns; 45 char *oldcwd; 46 }; 47 48 int nsinfo__init(struct nsinfo *nsi); 49 struct nsinfo *nsinfo__new(pid_t pid); 50 struct nsinfo *nsinfo__copy(const struct nsinfo *nsi); 51 52 struct nsinfo *nsinfo__get(struct nsinfo *nsi); 53 void nsinfo__put(struct nsinfo *nsi); 54 55 bool nsinfo__need_setns(const struct nsinfo *nsi); 56 void nsinfo__clear_need_setns(struct nsinfo *nsi); 57 pid_t nsinfo__tgid(const struct nsinfo *nsi); 58 pid_t nsinfo__nstgid(const struct nsinfo *nsi); 59 pid_t nsinfo__pid(const struct nsinfo *nsi); 60 pid_t nsinfo__in_pidns(const struct nsinfo *nsi); 61 62 void nsinfo__mountns_enter(struct nsinfo *nsi, struct nscookie *nc); 63 void nsinfo__mountns_exit(struct nscookie *nc); 64 65 char *nsinfo__realpath(const char *path, struct nsinfo *nsi); 66 int nsinfo__stat(const char *filename, struct stat *st, struct nsinfo *nsi); 67 68 bool nsinfo__is_in_root_namespace(void); 69 70 static inline void __nsinfo__zput(struct nsinfo **nsip) 71 { 72 if (nsip) { 73 nsinfo__put(*nsip); 74 *nsip = NULL; 75 } 76 } 77 78 #define nsinfo__zput(nsi) __nsinfo__zput(&nsi) 79 80 const char *perf_ns__name(unsigned int id); 81 82 #endif /* __PERF_NAMESPACES_H */ 83