linux/tools/perf/util/namespaces.h
Krister Johansen 544abd44c7 perf probe: Allow placing uprobes in alternate namespaces.
Teaches perf how to place a uprobe on a file that's in a different mount
namespace.  The user must add the probe using the --target-ns argument
to perf probe.  Once it has been placed, it may be recorded against
without further namespace-specific commands.

Signed-off-by: Krister Johansen <kjlx@templeofstupid.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
[ PPC build fixed by Ravi: ]
Link: http://lkml.kernel.org/r/1500287542-6219-1-git-send-email-ravi.bangoria@linux.vnet.ibm.com
Cc: Thomas-Mich Richter <tmricht@linux.vnet.ibm.com>
[ Fix !HAVE_DWARF_SUPPORT build ]
Link: http://lkml.kernel.org/r/1499305693-1599-4-git-send-email-kjlx@templeofstupid.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-07-18 23:14:10 -03:00

65 lines
1.4 KiB
C

/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2, as
* published by the Free Software Foundation.
*
* Copyright (C) 2017 Hari Bathini, IBM Corporation
*/
#ifndef __PERF_NAMESPACES_H
#define __PERF_NAMESPACES_H
#include "../perf.h"
#include <linux/list.h>
#include <linux/refcount.h>
struct namespaces_event;
struct namespaces {
struct list_head list;
u64 end_time;
struct perf_ns_link_info link_info[];
};
struct namespaces *namespaces__new(struct namespaces_event *event);
void namespaces__free(struct namespaces *namespaces);
struct nsinfo {
pid_t pid;
pid_t tgid;
pid_t nstgid;
bool need_setns;
char *mntns_path;
refcount_t refcnt;
};
struct nscookie {
int oldns;
int newns;
};
int nsinfo__init(struct nsinfo *nsi);
struct nsinfo *nsinfo__new(pid_t pid);
struct nsinfo *nsinfo__copy(struct nsinfo *nsi);
void nsinfo__delete(struct nsinfo *nsi);
struct nsinfo *nsinfo__get(struct nsinfo *nsi);
void nsinfo__put(struct nsinfo *nsi);
void nsinfo__mountns_enter(struct nsinfo *nsi, struct nscookie *nc);
void nsinfo__mountns_exit(struct nscookie *nc);
char *nsinfo__realpath(const char *path, struct nsinfo *nsi);
static inline void __nsinfo__zput(struct nsinfo **nsip)
{
if (nsip) {
nsinfo__put(*nsip);
*nsip = NULL;
}
}
#define nsinfo__zput(nsi) __nsinfo__zput(&nsi)
#endif /* __PERF_NAMESPACES_H */