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 #include <internal/rc_check.h> 17 18 #ifndef HAVE_SETNS_SUPPORT 19 int setns(int fd, int nstype); 20 #endif 21 22 struct perf_record_namespaces; 23 24 struct namespaces { 25 struct list_head list; 26 u64 end_time; 27 struct perf_ns_link_info link_info[]; 28 }; 29 30 struct namespaces *namespaces__new(struct perf_record_namespaces *event); 31 void namespaces__free(struct namespaces *namespaces); 32 DECLARE_RC_STRUCT(nsinfo)33DECLARE_RC_STRUCT(nsinfo) { 34 pid_t pid; 35 pid_t tgid; 36 pid_t nstgid; 37 bool need_setns; 38 bool in_pidns; 39 char *mntns_path; 40 refcount_t refcnt; 41 }; 42 43 struct nscookie { 44 int oldns; 45 int newns; 46 char *oldcwd; 47 }; 48 49 int nsinfo__init(struct nsinfo *nsi); 50 struct nsinfo *nsinfo__new(pid_t pid); 51 struct nsinfo *nsinfo__copy(const struct nsinfo *nsi); 52 53 struct nsinfo *nsinfo__get(struct nsinfo *nsi); 54 void nsinfo__put(struct nsinfo *nsi); 55 56 bool nsinfo__need_setns(const struct nsinfo *nsi); 57 void nsinfo__clear_need_setns(struct nsinfo *nsi); 58 pid_t nsinfo__tgid(const struct nsinfo *nsi); 59 pid_t nsinfo__nstgid(const struct nsinfo *nsi); 60 pid_t nsinfo__pid(const struct nsinfo *nsi); 61 pid_t nsinfo__in_pidns(const struct nsinfo *nsi); 62 63 void nsinfo__mountns_enter(struct nsinfo *nsi, struct nscookie *nc); 64 void nsinfo__mountns_exit(struct nscookie *nc); 65 66 char *nsinfo__realpath(const char *path, struct nsinfo *nsi); 67 int nsinfo__stat(const char *filename, struct stat *st, struct nsinfo *nsi); 68 69 bool nsinfo__is_in_root_namespace(void); 70 __nsinfo__zput(struct nsinfo ** nsip)71static inline void __nsinfo__zput(struct nsinfo **nsip) 72 { 73 if (nsip) { 74 nsinfo__put(*nsip); 75 *nsip = NULL; 76 } 77 } 78 79 #define nsinfo__zput(nsi) __nsinfo__zput(&nsi) 80 81 const char *perf_ns__name(unsigned int id); 82 83 #endif /* __PERF_NAMESPACES_H */ 84