1 /*
2 * builtin-probe.c
3 *
4 * Builtin probe command: Set up probe events by C expression
5 *
6 * Written by Masami Hiramatsu <mhiramat@redhat.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21 *
22 */
23 #include <sys/utsname.h>
24 #include <sys/types.h>
25 #include <sys/stat.h>
26 #include <fcntl.h>
27 #include <errno.h>
28 #include <stdio.h>
29 #include <unistd.h>
30 #include <stdlib.h>
31 #include <string.h>
32
33 #include "perf.h"
34 #include "builtin.h"
35 #include "util/util.h"
36 #include "util/strlist.h"
37 #include "util/strfilter.h"
38 #include "util/symbol.h"
39 #include "util/debug.h"
40 #include <subcmd/parse-options.h>
41 #include "util/probe-finder.h"
42 #include "util/probe-event.h"
43 #include "util/probe-file.h"
44
45 #define DEFAULT_VAR_FILTER "!__k???tab_* & !__crc_*"
46 #define DEFAULT_FUNC_FILTER "!_*"
47 #define DEFAULT_LIST_FILTER "*"
48
49 /* Session management structure */
50 static struct {
51 int command; /* Command short_name */
52 bool list_events;
53 bool uprobes;
54 bool quiet;
55 bool target_used;
56 int nevents;
57 struct perf_probe_event events[MAX_PROBES];
58 struct line_range line_range;
59 char *target;
60 struct strfilter *filter;
61 } params;
62
63 /* Parse an event definition. Note that any error must die. */
parse_probe_event(const char * str)64 static int parse_probe_event(const char *str)
65 {
66 struct perf_probe_event *pev = ¶ms.events[params.nevents];
67 int ret;
68
69 pr_debug("probe-definition(%d): %s\n", params.nevents, str);
70 if (++params.nevents == MAX_PROBES) {
71 pr_err("Too many probes (> %d) were specified.", MAX_PROBES);
72 return -1;
73 }
74
75 pev->uprobes = params.uprobes;
76 if (params.target) {
77 pev->target = strdup(params.target);
78 if (!pev->target)
79 return -ENOMEM;
80 params.target_used = true;
81 }
82
83 /* Parse a perf-probe command into event */
84 ret = parse_perf_probe_command(str, pev);
85 pr_debug("%d arguments\n", pev->nargs);
86
87 return ret;
88 }
89
params_add_filter(const char * str)90 static int params_add_filter(const char *str)
91 {
92 const char *err = NULL;
93 int ret = 0;
94
95 pr_debug2("Add filter: %s\n", str);
96 if (!params.filter) {
97 params.filter = strfilter__new(str, &err);
98 if (!params.filter)
99 ret = err ? -EINVAL : -ENOMEM;
100 } else
101 ret = strfilter__or(params.filter, str, &err);
102
103 if (ret == -EINVAL) {
104 pr_err("Filter parse error at %td.\n", err - str + 1);
105 pr_err("Source: \"%s\"\n", str);
106 pr_err(" %*c\n", (int)(err - str + 1), '^');
107 }
108
109 return ret;
110 }
111
set_target(const char * ptr)112 static int set_target(const char *ptr)
113 {
114 int found = 0;
115 const char *buf;
116
117 /*
118 * The first argument after options can be an absolute path
119 * to an executable / library or kernel module.
120 *
121 * TODO: Support relative path, and $PATH, $LD_LIBRARY_PATH,
122 * short module name.
123 */
124 if (!params.target && ptr && *ptr == '/') {
125 params.target = strdup(ptr);
126 if (!params.target)
127 return -ENOMEM;
128 params.target_used = false;
129
130 found = 1;
131 buf = ptr + (strlen(ptr) - 3);
132
133 if (strcmp(buf, ".ko"))
134 params.uprobes = true;
135
136 }
137
138 return found;
139 }
140
parse_probe_event_argv(int argc,const char ** argv)141 static int parse_probe_event_argv(int argc, const char **argv)
142 {
143 int i, len, ret, found_target;
144 char *buf;
145
146 found_target = set_target(argv[0]);
147 if (found_target < 0)
148 return found_target;
149
150 if (found_target && argc == 1)
151 return 0;
152
153 /* Bind up rest arguments */
154 len = 0;
155 for (i = 0; i < argc; i++) {
156 if (i == 0 && found_target)
157 continue;
158
159 len += strlen(argv[i]) + 1;
160 }
161 buf = zalloc(len + 1);
162 if (buf == NULL)
163 return -ENOMEM;
164 len = 0;
165 for (i = 0; i < argc; i++) {
166 if (i == 0 && found_target)
167 continue;
168
169 len += sprintf(&buf[len], "%s ", argv[i]);
170 }
171 ret = parse_probe_event(buf);
172 free(buf);
173 return ret;
174 }
175
opt_set_target(const struct option * opt,const char * str,int unset __maybe_unused)176 static int opt_set_target(const struct option *opt, const char *str,
177 int unset __maybe_unused)
178 {
179 int ret = -ENOENT;
180 char *tmp;
181
182 if (str) {
183 if (!strcmp(opt->long_name, "exec"))
184 params.uprobes = true;
185 else if (!strcmp(opt->long_name, "module"))
186 params.uprobes = false;
187 else
188 return ret;
189
190 /* Expand given path to absolute path, except for modulename */
191 if (params.uprobes || strchr(str, '/')) {
192 tmp = realpath(str, NULL);
193 if (!tmp) {
194 pr_warning("Failed to get the absolute path of %s: %m\n", str);
195 return ret;
196 }
197 } else {
198 tmp = strdup(str);
199 if (!tmp)
200 return -ENOMEM;
201 }
202 free(params.target);
203 params.target = tmp;
204 params.target_used = false;
205 ret = 0;
206 }
207
208 return ret;
209 }
210
211 /* Command option callbacks */
212
213 #ifdef HAVE_DWARF_SUPPORT
opt_show_lines(const struct option * opt,const char * str,int unset __maybe_unused)214 static int opt_show_lines(const struct option *opt,
215 const char *str, int unset __maybe_unused)
216 {
217 int ret = 0;
218
219 if (!str)
220 return 0;
221
222 if (params.command == 'L') {
223 pr_warning("Warning: more than one --line options are"
224 " detected. Only the first one is valid.\n");
225 return 0;
226 }
227
228 params.command = opt->short_name;
229 ret = parse_line_range_desc(str, ¶ms.line_range);
230
231 return ret;
232 }
233
opt_show_vars(const struct option * opt,const char * str,int unset __maybe_unused)234 static int opt_show_vars(const struct option *opt,
235 const char *str, int unset __maybe_unused)
236 {
237 struct perf_probe_event *pev = ¶ms.events[params.nevents];
238 int ret;
239
240 if (!str)
241 return 0;
242
243 ret = parse_probe_event(str);
244 if (!ret && pev->nargs != 0) {
245 pr_err(" Error: '--vars' doesn't accept arguments.\n");
246 return -EINVAL;
247 }
248 params.command = opt->short_name;
249
250 return ret;
251 }
252 #else
253 # define opt_show_lines NULL
254 # define opt_show_vars NULL
255 #endif
opt_add_probe_event(const struct option * opt,const char * str,int unset __maybe_unused)256 static int opt_add_probe_event(const struct option *opt,
257 const char *str, int unset __maybe_unused)
258 {
259 if (str) {
260 params.command = opt->short_name;
261 return parse_probe_event(str);
262 }
263
264 return 0;
265 }
266
opt_set_filter_with_command(const struct option * opt,const char * str,int unset)267 static int opt_set_filter_with_command(const struct option *opt,
268 const char *str, int unset)
269 {
270 if (!unset)
271 params.command = opt->short_name;
272
273 if (str)
274 return params_add_filter(str);
275
276 return 0;
277 }
278
opt_set_filter(const struct option * opt __maybe_unused,const char * str,int unset __maybe_unused)279 static int opt_set_filter(const struct option *opt __maybe_unused,
280 const char *str, int unset __maybe_unused)
281 {
282 if (str)
283 return params_add_filter(str);
284
285 return 0;
286 }
287
init_params(void)288 static int init_params(void)
289 {
290 return line_range__init(¶ms.line_range);
291 }
292
cleanup_params(void)293 static void cleanup_params(void)
294 {
295 int i;
296
297 for (i = 0; i < params.nevents; i++)
298 clear_perf_probe_event(params.events + i);
299 line_range__clear(¶ms.line_range);
300 free(params.target);
301 strfilter__delete(params.filter);
302 memset(¶ms, 0, sizeof(params));
303 }
304
pr_err_with_code(const char * msg,int err)305 static void pr_err_with_code(const char *msg, int err)
306 {
307 char sbuf[STRERR_BUFSIZE];
308
309 pr_err("%s", msg);
310 pr_debug(" Reason: %s (Code: %d)",
311 str_error_r(-err, sbuf, sizeof(sbuf)), err);
312 pr_err("\n");
313 }
314
perf_add_probe_events(struct perf_probe_event * pevs,int npevs)315 static int perf_add_probe_events(struct perf_probe_event *pevs, int npevs)
316 {
317 int ret;
318 int i, k;
319 const char *event = NULL, *group = NULL;
320
321 ret = init_probe_symbol_maps(pevs->uprobes);
322 if (ret < 0)
323 return ret;
324
325 ret = convert_perf_probe_events(pevs, npevs);
326 if (ret < 0)
327 goto out_cleanup;
328
329 if (params.command == 'D') { /* it shows definition */
330 ret = show_probe_trace_events(pevs, npevs);
331 goto out_cleanup;
332 }
333
334 ret = apply_perf_probe_events(pevs, npevs);
335 if (ret < 0)
336 goto out_cleanup;
337
338 for (i = k = 0; i < npevs; i++)
339 k += pevs[i].ntevs;
340
341 pr_info("Added new event%s\n", (k > 1) ? "s:" : ":");
342 for (i = 0; i < npevs; i++) {
343 struct perf_probe_event *pev = &pevs[i];
344
345 for (k = 0; k < pev->ntevs; k++) {
346 struct probe_trace_event *tev = &pev->tevs[k];
347
348 /* We use tev's name for showing new events */
349 show_perf_probe_event(tev->group, tev->event, pev,
350 tev->point.module, false);
351
352 /* Save the last valid name */
353 event = tev->event;
354 group = tev->group;
355 }
356 }
357
358 /* Note that it is possible to skip all events because of blacklist */
359 if (event) {
360 /* Show how to use the event. */
361 pr_info("\nYou can now use it in all perf tools, such as:\n\n");
362 pr_info("\tperf record -e %s:%s -aR sleep 1\n\n", group, event);
363 }
364
365 out_cleanup:
366 cleanup_perf_probe_events(pevs, npevs);
367 exit_probe_symbol_maps();
368 return ret;
369 }
370
del_perf_probe_caches(struct strfilter * filter)371 static int del_perf_probe_caches(struct strfilter *filter)
372 {
373 struct probe_cache *cache;
374 struct strlist *bidlist;
375 struct str_node *nd;
376 int ret;
377
378 bidlist = build_id_cache__list_all(false);
379 if (!bidlist) {
380 ret = -errno;
381 pr_debug("Failed to get buildids: %d\n", ret);
382 return ret ?: -ENOMEM;
383 }
384
385 strlist__for_each_entry(nd, bidlist) {
386 cache = probe_cache__new(nd->s);
387 if (!cache)
388 continue;
389 if (probe_cache__filter_purge(cache, filter) < 0 ||
390 probe_cache__commit(cache) < 0)
391 pr_warning("Failed to remove entries for %s\n", nd->s);
392 probe_cache__delete(cache);
393 }
394 return 0;
395 }
396
perf_del_probe_events(struct strfilter * filter)397 static int perf_del_probe_events(struct strfilter *filter)
398 {
399 int ret, ret2, ufd = -1, kfd = -1;
400 char *str = strfilter__string(filter);
401 struct strlist *klist = NULL, *ulist = NULL;
402 struct str_node *ent;
403
404 if (!str)
405 return -EINVAL;
406
407 pr_debug("Delete filter: \'%s\'\n", str);
408
409 if (probe_conf.cache)
410 return del_perf_probe_caches(filter);
411
412 /* Get current event names */
413 ret = probe_file__open_both(&kfd, &ufd, PF_FL_RW);
414 if (ret < 0)
415 goto out;
416
417 klist = strlist__new(NULL, NULL);
418 ulist = strlist__new(NULL, NULL);
419 if (!klist || !ulist) {
420 ret = -ENOMEM;
421 goto out;
422 }
423
424 ret = probe_file__get_events(kfd, filter, klist);
425 if (ret == 0) {
426 strlist__for_each_entry(ent, klist)
427 pr_info("Removed event: %s\n", ent->s);
428
429 ret = probe_file__del_strlist(kfd, klist);
430 if (ret < 0)
431 goto error;
432 }
433
434 ret2 = probe_file__get_events(ufd, filter, ulist);
435 if (ret2 == 0) {
436 strlist__for_each_entry(ent, ulist)
437 pr_info("Removed event: %s\n", ent->s);
438
439 ret2 = probe_file__del_strlist(ufd, ulist);
440 if (ret2 < 0)
441 goto error;
442 }
443
444 if (ret == -ENOENT && ret2 == -ENOENT)
445 pr_warning("\"%s\" does not hit any event.\n", str);
446 else
447 ret = 0;
448
449 error:
450 if (kfd >= 0)
451 close(kfd);
452 if (ufd >= 0)
453 close(ufd);
454 out:
455 strlist__delete(klist);
456 strlist__delete(ulist);
457 free(str);
458
459 return ret;
460 }
461
462 #ifdef HAVE_DWARF_SUPPORT
463 #define PROBEDEF_STR \
464 "[EVENT=]FUNC[@SRC][+OFF|%return|:RL|;PT]|SRC:AL|SRC;PT [[NAME=]ARG ...]"
465 #else
466 #define PROBEDEF_STR "[EVENT=]FUNC[+OFF|%return] [[NAME=]ARG ...]"
467 #endif
468
469
470 static int
__cmd_probe(int argc,const char ** argv,const char * prefix __maybe_unused)471 __cmd_probe(int argc, const char **argv, const char *prefix __maybe_unused)
472 {
473 const char * const probe_usage[] = {
474 "perf probe [<options>] 'PROBEDEF' ['PROBEDEF' ...]",
475 "perf probe [<options>] --add 'PROBEDEF' [--add 'PROBEDEF' ...]",
476 "perf probe [<options>] --del '[GROUP:]EVENT' ...",
477 "perf probe --list [GROUP:]EVENT ...",
478 #ifdef HAVE_DWARF_SUPPORT
479 "perf probe [<options>] --line 'LINEDESC'",
480 "perf probe [<options>] --vars 'PROBEPOINT'",
481 #endif
482 "perf probe [<options>] --funcs",
483 NULL
484 };
485 struct option options[] = {
486 OPT_INCR('v', "verbose", &verbose,
487 "be more verbose (show parsed arguments, etc)"),
488 OPT_BOOLEAN('q', "quiet", ¶ms.quiet,
489 "be quiet (do not show any mesages)"),
490 OPT_CALLBACK_DEFAULT('l', "list", NULL, "[GROUP:]EVENT",
491 "list up probe events",
492 opt_set_filter_with_command, DEFAULT_LIST_FILTER),
493 OPT_CALLBACK('d', "del", NULL, "[GROUP:]EVENT", "delete a probe event.",
494 opt_set_filter_with_command),
495 OPT_CALLBACK('a', "add", NULL, PROBEDEF_STR,
496 "probe point definition, where\n"
497 "\t\tGROUP:\tGroup name (optional)\n"
498 "\t\tEVENT:\tEvent name\n"
499 "\t\tFUNC:\tFunction name\n"
500 "\t\tOFF:\tOffset from function entry (in byte)\n"
501 "\t\t%return:\tPut the probe at function return\n"
502 #ifdef HAVE_DWARF_SUPPORT
503 "\t\tSRC:\tSource code path\n"
504 "\t\tRL:\tRelative line number from function entry.\n"
505 "\t\tAL:\tAbsolute line number in file.\n"
506 "\t\tPT:\tLazy expression of line code.\n"
507 "\t\tARG:\tProbe argument (local variable name or\n"
508 "\t\t\tkprobe-tracer argument format.)\n",
509 #else
510 "\t\tARG:\tProbe argument (kprobe-tracer argument format.)\n",
511 #endif
512 opt_add_probe_event),
513 OPT_CALLBACK('D', "definition", NULL, PROBEDEF_STR,
514 "Show trace event definition of given traceevent for k/uprobe_events.",
515 opt_add_probe_event),
516 OPT_BOOLEAN('f', "force", &probe_conf.force_add, "forcibly add events"
517 " with existing name"),
518 OPT_CALLBACK('L', "line", NULL,
519 "FUNC[:RLN[+NUM|-RLN2]]|SRC:ALN[+NUM|-ALN2]",
520 "Show source code lines.", opt_show_lines),
521 OPT_CALLBACK('V', "vars", NULL,
522 "FUNC[@SRC][+OFF|%return|:RL|;PT]|SRC:AL|SRC;PT",
523 "Show accessible variables on PROBEDEF", opt_show_vars),
524 OPT_BOOLEAN('\0', "externs", &probe_conf.show_ext_vars,
525 "Show external variables too (with --vars only)"),
526 OPT_BOOLEAN('\0', "range", &probe_conf.show_location_range,
527 "Show variables location range in scope (with --vars only)"),
528 OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
529 "file", "vmlinux pathname"),
530 OPT_STRING('s', "source", &symbol_conf.source_prefix,
531 "directory", "path to kernel source"),
532 OPT_BOOLEAN('\0', "no-inlines", &probe_conf.no_inlines,
533 "Don't search inlined functions"),
534 OPT__DRY_RUN(&probe_event_dry_run),
535 OPT_INTEGER('\0', "max-probes", &probe_conf.max_probes,
536 "Set how many probe points can be found for a probe."),
537 OPT_CALLBACK_DEFAULT('F', "funcs", NULL, "[FILTER]",
538 "Show potential probe-able functions.",
539 opt_set_filter_with_command, DEFAULT_FUNC_FILTER),
540 OPT_CALLBACK('\0', "filter", NULL,
541 "[!]FILTER", "Set a filter (with --vars/funcs only)\n"
542 "\t\t\t(default: \"" DEFAULT_VAR_FILTER "\" for --vars,\n"
543 "\t\t\t \"" DEFAULT_FUNC_FILTER "\" for --funcs)",
544 opt_set_filter),
545 OPT_CALLBACK('x', "exec", NULL, "executable|path",
546 "target executable name or path", opt_set_target),
547 OPT_CALLBACK('m', "module", NULL, "modname|path",
548 "target module name (for online) or path (for offline)",
549 opt_set_target),
550 OPT_BOOLEAN(0, "demangle", &symbol_conf.demangle,
551 "Enable symbol demangling"),
552 OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel,
553 "Enable kernel symbol demangling"),
554 OPT_BOOLEAN(0, "cache", &probe_conf.cache, "Manipulate probe cache"),
555 OPT_END()
556 };
557 int ret;
558
559 set_option_flag(options, 'a', "add", PARSE_OPT_EXCLUSIVE);
560 set_option_flag(options, 'd', "del", PARSE_OPT_EXCLUSIVE);
561 set_option_flag(options, 'D', "definition", PARSE_OPT_EXCLUSIVE);
562 set_option_flag(options, 'l', "list", PARSE_OPT_EXCLUSIVE);
563 #ifdef HAVE_DWARF_SUPPORT
564 set_option_flag(options, 'L', "line", PARSE_OPT_EXCLUSIVE);
565 set_option_flag(options, 'V', "vars", PARSE_OPT_EXCLUSIVE);
566 #else
567 # define set_nobuild(s, l, c) set_option_nobuild(options, s, l, "NO_DWARF=1", c)
568 set_nobuild('L', "line", false);
569 set_nobuild('V', "vars", false);
570 set_nobuild('\0', "externs", false);
571 set_nobuild('\0', "range", false);
572 set_nobuild('k', "vmlinux", true);
573 set_nobuild('s', "source", true);
574 set_nobuild('\0', "no-inlines", true);
575 # undef set_nobuild
576 #endif
577 set_option_flag(options, 'F', "funcs", PARSE_OPT_EXCLUSIVE);
578
579 argc = parse_options(argc, argv, options, probe_usage,
580 PARSE_OPT_STOP_AT_NON_OPTION);
581 if (argc > 0) {
582 if (strcmp(argv[0], "-") == 0) {
583 usage_with_options_msg(probe_usage, options,
584 "'-' is not supported.\n");
585 }
586 if (params.command && params.command != 'a') {
587 usage_with_options_msg(probe_usage, options,
588 "another command except --add is set.\n");
589 }
590 ret = parse_probe_event_argv(argc, argv);
591 if (ret < 0) {
592 pr_err_with_code(" Error: Command Parse Error.", ret);
593 return ret;
594 }
595 params.command = 'a';
596 }
597
598 if (params.quiet) {
599 if (verbose != 0) {
600 pr_err(" Error: -v and -q are exclusive.\n");
601 return -EINVAL;
602 }
603 verbose = -1;
604 }
605
606 if (probe_conf.max_probes == 0)
607 probe_conf.max_probes = MAX_PROBES;
608
609 /*
610 * Only consider the user's kernel image path if given.
611 */
612 symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
613
614 /*
615 * Except for --list, --del and --add, other command doesn't depend
616 * nor change running kernel. So if user gives offline vmlinux,
617 * ignore its buildid.
618 */
619 if (!strchr("lda", params.command) && symbol_conf.vmlinux_name)
620 symbol_conf.ignore_vmlinux_buildid = true;
621
622 switch (params.command) {
623 case 'l':
624 if (params.uprobes) {
625 pr_err(" Error: Don't use --list with --exec.\n");
626 parse_options_usage(probe_usage, options, "l", true);
627 parse_options_usage(NULL, options, "x", true);
628 return -EINVAL;
629 }
630 ret = show_perf_probe_events(params.filter);
631 if (ret < 0)
632 pr_err_with_code(" Error: Failed to show event list.", ret);
633 return ret;
634 case 'F':
635 ret = show_available_funcs(params.target, params.filter,
636 params.uprobes);
637 if (ret < 0)
638 pr_err_with_code(" Error: Failed to show functions.", ret);
639 return ret;
640 #ifdef HAVE_DWARF_SUPPORT
641 case 'L':
642 ret = show_line_range(¶ms.line_range, params.target,
643 params.uprobes);
644 if (ret < 0)
645 pr_err_with_code(" Error: Failed to show lines.", ret);
646 return ret;
647 case 'V':
648 if (!params.filter)
649 params.filter = strfilter__new(DEFAULT_VAR_FILTER,
650 NULL);
651
652 ret = show_available_vars(params.events, params.nevents,
653 params.filter);
654 if (ret < 0)
655 pr_err_with_code(" Error: Failed to show vars.", ret);
656 return ret;
657 #endif
658 case 'd':
659 ret = perf_del_probe_events(params.filter);
660 if (ret < 0) {
661 pr_err_with_code(" Error: Failed to delete events.", ret);
662 return ret;
663 }
664 break;
665 case 'D':
666 case 'a':
667
668 /* Ensure the last given target is used */
669 if (params.target && !params.target_used) {
670 pr_err(" Error: -x/-m must follow the probe definitions.\n");
671 parse_options_usage(probe_usage, options, "m", true);
672 parse_options_usage(NULL, options, "x", true);
673 return -EINVAL;
674 }
675
676 ret = perf_add_probe_events(params.events, params.nevents);
677 if (ret < 0) {
678 pr_err_with_code(" Error: Failed to add events.", ret);
679 return ret;
680 }
681 break;
682 default:
683 usage_with_options(probe_usage, options);
684 }
685 return 0;
686 }
687
cmd_probe(int argc,const char ** argv,const char * prefix)688 int cmd_probe(int argc, const char **argv, const char *prefix)
689 {
690 int ret;
691
692 ret = init_params();
693 if (!ret) {
694 ret = __cmd_probe(argc, argv, prefix);
695 cleanup_params();
696 }
697
698 return ret < 0 ? ret : 0;
699 }
700