perf-eh_elf/util/trace-event-scripting.c

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Merge tag 'afs-fixes-20180514' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs Pull AFS fixes from David Howells: "Here's a set of patches that fix a number of bugs in the in-kernel AFS client, including: - Fix directory locking to not use individual page locks for directory reading/scanning but rather to use a semaphore on the afs_vnode struct as the directory contents must be read in a single blob and data from different reads must not be mixed as the entire contents may be shuffled about between reads. - Fix address list parsing to handle port specifiers correctly. - Only give up callback records on a server if we actually talked to that server (we might not be able to access a server). - Fix some callback handling bugs, including refcounting, whole-volume callbacks and when callbacks actually get broken in response to a CB.CallBack op. - Fix some server/address rotation bugs, including giving up if we can't probe a server; giving up if a server says it doesn't have a volume, but there are more servers to try. - Fix the decoding of fetched statuses to be OpenAFS compatible. - Fix the handling of server lookups in Cache Manager ops (such as CB.InitCallBackState3) to use a UUID if possible and to handle no server being found. - Fix a bug in server lookup where not all addresses are compared. - Fix the non-encryption of calls that prevents some servers from being accessed (this also requires an AF_RXRPC patch that has already gone in through the net tree). There's also a patch that adds tracepoints to log Cache Manager ops that don't find a matching server, either by UUID or by address" * tag 'afs-fixes-20180514' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs: afs: Fix the non-encryption of calls afs: Fix CB.CallBack handling afs: Fix whole-volume callback handling afs: Fix afs_find_server search loop afs: Fix the handling of an unfound server in CM operations afs: Add a tracepoint to record callbacks from unlisted servers afs: Fix the handling of CB.InitCallBackState3 to find the server by UUID afs: Fix VNOVOL handling in address rotation afs: Fix AFSFetchStatus decoder to provide OpenAFS compatibility afs: Fix server rotation's handling of fileserver probe failure afs: Fix refcounting in callback registration afs: Fix giving up callbacks on server destruction afs: Fix address list parsing afs: Fix directory page locking
2018-05-15 19:48:36 +02:00
/*
* trace-event-scripting. Scripting engine common and initialization code.
*
* Copyright (C) 2009-2010 Tom Zanussi <tzanussi@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include "../perf.h"
#include "debug.h"
#include "util.h"
#include "trace-event.h"
struct scripting_context *scripting_context;
static int flush_script_unsupported(void)
{
return 0;
}
static int stop_script_unsupported(void)
{
return 0;
}
static void process_event_unsupported(union perf_event *event __maybe_unused,
struct perf_sample *sample __maybe_unused,
struct perf_evsel *evsel __maybe_unused,
struct addr_location *al __maybe_unused)
{
}
static void print_python_unsupported_msg(void)
{
fprintf(stderr, "Python scripting not supported."
" Install libpython and rebuild perf to enable it.\n"
"For example:\n # apt-get install python-dev (ubuntu)"
"\n # yum install python-devel (Fedora)"
"\n etc.\n");
}
static int python_start_script_unsupported(const char *script __maybe_unused,
int argc __maybe_unused,
const char **argv __maybe_unused)
{
print_python_unsupported_msg();
return -1;
}
static int python_generate_script_unsupported(struct pevent *pevent
__maybe_unused,
const char *outfile
__maybe_unused)
{
print_python_unsupported_msg();
return -1;
}
struct scripting_ops python_scripting_unsupported_ops = {
.name = "Python",
.start_script = python_start_script_unsupported,
.flush_script = flush_script_unsupported,
.stop_script = stop_script_unsupported,
.process_event = process_event_unsupported,
.generate_script = python_generate_script_unsupported,
};
static void register_python_scripting(struct scripting_ops *scripting_ops)
{
if (scripting_context == NULL)
scripting_context = malloc(sizeof(*scripting_context));
if (scripting_context == NULL ||
script_spec_register("Python", scripting_ops) ||
script_spec_register("py", scripting_ops)) {
pr_err("Error registering Python script extension: disabling it\n");
zfree(&scripting_context);
}
}
#ifndef HAVE_LIBPYTHON_SUPPORT
void setup_python_scripting(void)
{
register_python_scripting(&python_scripting_unsupported_ops);
}
#else
extern struct scripting_ops python_scripting_ops;
void setup_python_scripting(void)
{
register_python_scripting(&python_scripting_ops);
}
#endif
static void print_perl_unsupported_msg(void)
{
fprintf(stderr, "Perl scripting not supported."
" Install libperl and rebuild perf to enable it.\n"
"For example:\n # apt-get install libperl-dev (ubuntu)"
"\n # yum install 'perl(ExtUtils::Embed)' (Fedora)"
"\n etc.\n");
}
static int perl_start_script_unsupported(const char *script __maybe_unused,
int argc __maybe_unused,
const char **argv __maybe_unused)
{
print_perl_unsupported_msg();
return -1;
}
static int perl_generate_script_unsupported(struct pevent *pevent
__maybe_unused,
const char *outfile __maybe_unused)
{
print_perl_unsupported_msg();
return -1;
}
struct scripting_ops perl_scripting_unsupported_ops = {
.name = "Perl",
.start_script = perl_start_script_unsupported,
.flush_script = flush_script_unsupported,
.stop_script = stop_script_unsupported,
.process_event = process_event_unsupported,
.generate_script = perl_generate_script_unsupported,
};
static void register_perl_scripting(struct scripting_ops *scripting_ops)
{
if (scripting_context == NULL)
scripting_context = malloc(sizeof(*scripting_context));
if (scripting_context == NULL ||
script_spec_register("Perl", scripting_ops) ||
script_spec_register("pl", scripting_ops)) {
pr_err("Error registering Perl script extension: disabling it\n");
zfree(&scripting_context);
}
}
#ifndef HAVE_LIBPERL_SUPPORT
void setup_perl_scripting(void)
{
register_perl_scripting(&perl_scripting_unsupported_ops);
}
#else
extern struct scripting_ops perl_scripting_ops;
void setup_perl_scripting(void)
{
register_perl_scripting(&perl_scripting_ops);
}
#endif