diff options
| author | Krister Johansen <kjlx@templeofstupid.com> | 2017-07-05 18:48:10 -0700 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2017-07-18 23:14:10 -0300 |
| commit | 544abd44c7064c8a58a6bd2073d757f6b91d98c5 (patch) | |
| tree | faa9e5d4c4b86067f4b5cd9f8200010a726a314d /tools/perf/util/namespaces.c | |
| parent | bf2e710b3cb8445c052f2ff50b4875a2523bb279 (diff) | |
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>
Diffstat (limited to 'tools/perf/util/namespaces.c')
| -rw-r--r-- | tools/perf/util/namespaces.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/tools/perf/util/namespaces.c b/tools/perf/util/namespaces.c index fc5f398779a4..a58e91197729 100644 --- a/tools/perf/util/namespaces.c +++ b/tools/perf/util/namespaces.c @@ -11,6 +11,7 @@ #include "event.h" #include <sys/types.h> #include <sys/stat.h> +#include <limits.h> #include <sched.h> #include <stdlib.h> #include <stdio.h> @@ -233,3 +234,15 @@ void nsinfo__mountns_exit(struct nscookie *nc) nc->newns = -1; } } + +char *nsinfo__realpath(const char *path, struct nsinfo *nsi) +{ + char *rpath; + struct nscookie nsc; + + nsinfo__mountns_enter(nsi, &nsc); + rpath = realpath(path, NULL); + nsinfo__mountns_exit(&nsc); + + return rpath; +} |