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Message-Id: <1386947526-7118-20-git-send-email-acme@infradead.org>
Date: Fri, 13 Dec 2013 12:12:05 -0300
From: Arnaldo Carvalho de Melo <acme@...radead.org>
To: Ingo Molnar <mingo@...nel.org>
Cc: linux-kernel@...r.kernel.org, Namhyung Kim <namhyung.kim@....com>,
Namhyung Kim <namhyung@...nel.org>,
Frederic Weisbecker <fweisbec@...il.com>,
Jiri Olsa <jolsa@...hat.com>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Steven Rostedt <rostedt@...dmis.org>,
Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: [PATCH 19/20] tools lib traceevent: Make pevent_filter_add_filter_str() return pevent_errno
From: Namhyung Kim <namhyung.kim@....com>
Refactor the pevent_filter_add_filter_str() to return a proper error
code and get rid of the third error_str argument.
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Ingo Molnar <mingo@...nel.org>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Steven Rostedt <rostedt@...dmis.org>
Link: http://lkml.kernel.org/r/1386833777-3790-12-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
tools/lib/traceevent/event-parse.h | 8 ++--
tools/lib/traceevent/parse-filter.c | 78 +++++++++++--------------------------
2 files changed, 27 insertions(+), 59 deletions(-)
diff --git a/tools/lib/traceevent/event-parse.h b/tools/lib/traceevent/event-parse.h
index da942d59cc3a..089964e56ed4 100644
--- a/tools/lib/traceevent/event-parse.h
+++ b/tools/lib/traceevent/event-parse.h
@@ -372,7 +372,8 @@ enum pevent_flag {
_PE(ILLEGAL_TOKEN, "illegal token"), \
_PE(INVALID_PAREN, "open parenthesis cannot come here"), \
_PE(UNBALANCED_PAREN, "unbalanced number of parenthesis"), \
- _PE(UNKNOWN_TOKEN, "unknown token")
+ _PE(UNKNOWN_TOKEN, "unknown token"), \
+ _PE(FILTER_NOT_FOUND, "no filter found")
#undef _PE
#define _PE(__code, __str) PEVENT_ERRNO__ ## __code
@@ -863,9 +864,8 @@ enum filter_trivial_type {
FILTER_TRIVIAL_BOTH,
};
-int pevent_filter_add_filter_str(struct event_filter *filter,
- const char *filter_str,
- char **error_str);
+enum pevent_errno pevent_filter_add_filter_str(struct event_filter *filter,
+ const char *filter_str);
int pevent_filter_match(struct event_filter *filter,
diff --git a/tools/lib/traceevent/parse-filter.c b/tools/lib/traceevent/parse-filter.c
index 5aa5012a17ee..78440d73e0ad 100644
--- a/tools/lib/traceevent/parse-filter.c
+++ b/tools/lib/traceevent/parse-filter.c
@@ -1209,7 +1209,7 @@ process_filter(struct event_format *event, struct filter_arg **parg,
return ret;
}
-static int
+static enum pevent_errno
process_event(struct event_format *event, const char *filter_str,
struct filter_arg **parg, char **error_str)
{
@@ -1218,21 +1218,15 @@ process_event(struct event_format *event, const char *filter_str,
pevent_buffer_init(filter_str, strlen(filter_str));
ret = process_filter(event, parg, error_str, 0);
- if (ret == 1) {
- show_error(error_str,
- "Unbalanced number of ')'");
- return -1;
- }
if (ret < 0)
return ret;
/* If parg is NULL, then make it into FALSE */
if (!*parg) {
*parg = allocate_arg();
- if (*parg == NULL) {
- show_error(error_str, "failed to allocate filter arg");
- return -1;
- }
+ if (*parg == NULL)
+ return PEVENT_ERRNO__MEM_ALLOC_FAILED;
+
(*parg)->type = FILTER_ARG_BOOLEAN;
(*parg)->boolean.value = FILTER_FALSE;
}
@@ -1240,13 +1234,13 @@ process_event(struct event_format *event, const char *filter_str,
return 0;
}
-static int filter_event(struct event_filter *filter,
- struct event_format *event,
- const char *filter_str, char **error_str)
+static enum pevent_errno
+filter_event(struct event_filter *filter, struct event_format *event,
+ const char *filter_str, char **error_str)
{
struct filter_type *filter_type;
struct filter_arg *arg;
- int ret;
+ enum pevent_errno ret;
if (filter_str) {
ret = process_event(event, filter_str, &arg, error_str);
@@ -1256,20 +1250,16 @@ static int filter_event(struct event_filter *filter,
} else {
/* just add a TRUE arg */
arg = allocate_arg();
- if (arg == NULL) {
- show_error(error_str, "failed to allocate filter arg");
- return -1;
- }
+ if (arg == NULL)
+ return PEVENT_ERRNO__MEM_ALLOC_FAILED;
+
arg->type = FILTER_ARG_BOOLEAN;
arg->boolean.value = FILTER_TRUE;
}
filter_type = add_filter_type(filter, event->id);
- if (filter_type == NULL) {
- show_error(error_str, "failed to add a new filter: %s",
- filter_str ? filter_str : "true");
- return -1;
- }
+ if (filter_type == NULL)
+ return PEVENT_ERRNO__MEM_ALLOC_FAILED;
if (filter_type->filter)
free_arg(filter_type->filter);
@@ -1282,18 +1272,12 @@ static int filter_event(struct event_filter *filter,
* pevent_filter_add_filter_str - add a new filter
* @filter: the event filter to add to
* @filter_str: the filter string that contains the filter
- * @error_str: string containing reason for failed filter
- *
- * Returns 0 if the filter was successfully added
- * -1 if there was an error.
*
- * On error, if @error_str points to a string pointer,
- * it is set to the reason that the filter failed.
- * This string must be freed with "free".
+ * Returns 0 if the filter was successfully added or a
+ * negative error code.
*/
-int pevent_filter_add_filter_str(struct event_filter *filter,
- const char *filter_str,
- char **error_str)
+enum pevent_errno pevent_filter_add_filter_str(struct event_filter *filter,
+ const char *filter_str)
{
struct pevent *pevent = filter->pevent;
struct event_list *event;
@@ -1304,23 +1288,20 @@ int pevent_filter_add_filter_str(struct event_filter *filter,
char *event_name = NULL;
char *sys_name = NULL;
char *sp;
- int rtn = 0;
+ enum pevent_errno rtn = 0; /* PEVENT_ERRNO__SUCCESS */
int len;
int ret;
+ char *error_str = NULL;
/* clear buffer to reset show error */
pevent_buffer_init("", 0);
- if (error_str)
- *error_str = NULL;
-
filter_start = strchr(filter_str, ':');
if (filter_start)
len = filter_start - filter_str;
else
len = strlen(filter_str);
-
do {
next_event = strchr(filter_str, ',');
if (next_event &&
@@ -1333,10 +1314,9 @@ int pevent_filter_add_filter_str(struct event_filter *filter,
this_event = malloc(len + 1);
if (this_event == NULL) {
- show_error(error_str, "Memory allocation failure");
/* This can only happen when events is NULL, but still */
free_events(events);
- return -1;
+ return PEVENT_ERRNO__MEM_ALLOC_FAILED;
}
memcpy(this_event, filter_str, len);
this_event[len] = 0;
@@ -1350,30 +1330,18 @@ int pevent_filter_add_filter_str(struct event_filter *filter,
event_name = strtok_r(NULL, "/", &sp);
if (!sys_name) {
- show_error(error_str, "No filter found");
/* This can only happen when events is NULL, but still */
free_events(events);
free(this_event);
- return -1;
+ return PEVENT_ERRNO__FILTER_NOT_FOUND;
}
/* Find this event */
ret = find_event(pevent, &events, strim(sys_name), strim(event_name));
if (ret < 0) {
- if (ret == PEVENT_ERRNO__MEM_ALLOC_FAILED)
- show_error(error_str,
- "Memory allocation failure");
- else if (event_name)
- show_error(error_str,
- "No event found under '%s.%s'",
- sys_name, event_name);
- else
- show_error(error_str,
- "No event found under '%s'",
- sys_name);
free_events(events);
free(this_event);
- return -1;
+ return ret;
}
free(this_event);
} while (filter_str);
@@ -1385,7 +1353,7 @@ int pevent_filter_add_filter_str(struct event_filter *filter,
/* filter starts here */
for (event = events; event; event = event->next) {
ret = filter_event(filter, event->event, filter_start,
- error_str);
+ &error_str);
/* Failures are returned if a parse error happened */
if (ret < 0)
rtn = ret;
--
1.8.1.4
--
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