84 lines · c
1/* SPDX-License-Identifier: GPL-2.0-only */2/*3 *4 * Copyright (C) 2017 Hari Bathini, IBM Corporation5 */6 7#ifndef __PERF_NAMESPACES_H8#define __PERF_NAMESPACES_H9 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_SUPPORT19int setns(int fd, int nstype);20#endif21 22struct perf_record_namespaces;23 24struct namespaces {25 struct list_head list;26 u64 end_time;27 struct perf_ns_link_info link_info[];28};29 30struct namespaces *namespaces__new(struct perf_record_namespaces *event);31void namespaces__free(struct namespaces *namespaces);32 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 43struct nscookie {44 int oldns;45 int newns;46 char *oldcwd;47};48 49int nsinfo__init(struct nsinfo *nsi);50struct nsinfo *nsinfo__new(pid_t pid);51struct nsinfo *nsinfo__copy(const struct nsinfo *nsi);52 53struct nsinfo *nsinfo__get(struct nsinfo *nsi);54void nsinfo__put(struct nsinfo *nsi);55 56bool nsinfo__need_setns(const struct nsinfo *nsi);57void nsinfo__clear_need_setns(struct nsinfo *nsi);58pid_t nsinfo__tgid(const struct nsinfo *nsi);59pid_t nsinfo__nstgid(const struct nsinfo *nsi);60pid_t nsinfo__pid(const struct nsinfo *nsi);61pid_t nsinfo__in_pidns(const struct nsinfo *nsi);62 63void nsinfo__mountns_enter(struct nsinfo *nsi, struct nscookie *nc);64void nsinfo__mountns_exit(struct nscookie *nc);65 66char *nsinfo__realpath(const char *path, struct nsinfo *nsi);67int nsinfo__stat(const char *filename, struct stat *st, struct nsinfo *nsi);68 69bool nsinfo__is_in_root_namespace(void);70 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 81const char *perf_ns__name(unsigned int id);82 83#endif /* __PERF_NAMESPACES_H */84