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Date: Fri, 24 Apr 2015 08:37:23 +0900
From: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
To: Arnaldo Carvalho de Melo <acme@...nel.org>
CC: Peter Zijlstra <peterz@...radead.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
David Ahern <dsahern@...il.com>, namhyung@...nel.org,
Jiri Olsa <jolsa@...hat.com>, Ingo Molnar <mingo@...nel.org>
Subject: Re: Re: [PATCH perf/core v2 3/8] perf probe: Accept multiple filter
options
(2015/04/23 23:55), Arnaldo Carvalho de Melo wrote:
> Em Thu, Apr 23, 2015 at 10:46:17PM +0900, Masami Hiramatsu escreveu:
>> Accept multiple filter options. Each filters are combined
>> by logical-or. E.g. --filter abc* --filter *def is same
>> as --filter abc*|*def
>
> Please break this patch in two, one introducing the new strfilter
> functionality, the other making perf-probe use it.
>
> This way if later I had to revert the perf-probe part but keep the
> strfilter, if used by a later patch, that would be possible.
>
> I.e. in general please try to add new functionality for a library
> function in a patch and the actual use of it in another patch.
OK, I'll split strfilter features(__or, __string) out from
these patches.
> I applied the first two, and will continue after you reply to this,
> thanks!
thanks!
>
> - Arnaldo
>
>> Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
>> ---
>> tools/perf/builtin-probe.c | 14 +++++++++-----
>> tools/perf/util/strfilter.c | 34 ++++++++++++++++++++++++++++++++++
>> tools/perf/util/strfilter.h | 13 +++++++++++++
>> 3 files changed, 56 insertions(+), 5 deletions(-)
>>
>> diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c
>> index 92dcce0..be17075 100644
>> --- a/tools/perf/builtin-probe.c
>> +++ b/tools/perf/builtin-probe.c
>> @@ -262,21 +262,25 @@ static int opt_set_filter(const struct option *opt __maybe_unused,
>> const char *str, int unset __maybe_unused)
>> {
>> const char *err;
>> + int ret = 0;
>>
>> if (str) {
>> pr_debug2("Set filter: %s\n", str);
>> - if (params.filter)
>> - strfilter__delete(params.filter);
>> - params.filter = strfilter__new(str, &err);
>> if (!params.filter) {
>> + params.filter = strfilter__new(str, &err);
>> + if (!params.filter)
>> + ret = err ? -EINVAL : -ENOMEM;
>> + } else
>> + ret = strfilter__or(params.filter, str, &err);
>> +
>> + if (ret == -EINVAL) {
>> pr_err("Filter parse error at %td.\n", err - str + 1);
>> pr_err("Source: \"%s\"\n", str);
>> pr_err(" %*c\n", (int)(err - str + 1), '^');
>> - return -EINVAL;
>> }
>> }
>>
>> - return 0;
>> + return ret;
>> }
>>
>> static int init_params(void)
>> diff --git a/tools/perf/util/strfilter.c b/tools/perf/util/strfilter.c
>> index 79a757a..cd659e6 100644
>> --- a/tools/perf/util/strfilter.c
>> +++ b/tools/perf/util/strfilter.c
>> @@ -170,6 +170,40 @@ struct strfilter *strfilter__new(const char *rules, const char **err)
>> return filter;
>> }
>>
>> +static int strfilter__add(struct strfilter *filter, bool _or, const char *rules,
>> + const char **err)
>> +{
>> + struct strfilter_node *right, *root;
>> + const char *ep = NULL;
>> +
>> + if (!filter || !rules)
>> + return -EINVAL;
>> +
>> + right = strfilter_node__new(rules, &ep);
>> + if (!right || *ep != '\0') {
>> + if (err)
>> + *err = ep;
>> + goto error;
>> + }
>> + root = strfilter_node__alloc(_or ? OP_or : OP_and, filter->root, right);
>> + if (!root) {
>> + ep = NULL;
>> + goto error;
>> + }
>> +
>> + filter->root = root;
>> + return 0;
>> +
>> +error:
>> + strfilter_node__delete(right);
>> + return ep ? -EINVAL : -ENOMEM;
>> +}
>> +
>> +int strfilter__or(struct strfilter *filter, const char *rules, const char **err)
>> +{
>> + return strfilter__add(filter, true, rules, err);
>> +}
>> +
>> static bool strfilter_node__compare(struct strfilter_node *node,
>> const char *str)
>> {
>> diff --git a/tools/perf/util/strfilter.h b/tools/perf/util/strfilter.h
>> index fe611f3..c81ff97 100644
>> --- a/tools/perf/util/strfilter.h
>> +++ b/tools/perf/util/strfilter.h
>> @@ -29,6 +29,19 @@ struct strfilter {
>> struct strfilter *strfilter__new(const char *rules, const char **err);
>>
>> /**
>> + * strfilter__or - Add an additional rule by logical-or
>> + * @filter: Original string filter
>> + * @rules: Filter rule to add at left of the root of @filter
>> + * by using logical-and.
>> + * @err: Pointer which points an error detected on @rules
>> + *
>> + * Parse @rules and join it to the @filter by using logical-or.
>> + * Return 0 if success, or return the error code.
>> + */
>> +int strfilter__or(struct strfilter *filter,
>> + const char *rules, const char **err);
>> +
>> +/**
>> * strfilter__compare - compare given string and a string filter
>> * @filter: String filter
>> * @str: target string
> --
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>
--
Masami HIRAMATSU
Linux Technology Research Center, System Productivity Research Dept.
Center for Technology Innovation - Systems Engineering
Hitachi, Ltd., Research & Development Group
E-mail: masami.hiramatsu.pt@...achi.com
--
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