Merge tag 'trace-tools-v7.1-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace

Pull RTLA fix from Steven Rostedt:

 - Fix multi-character short option parsing

   Fix regression in parsing of multiple-character short options
   (eg -p100 /= -p 100/, -un /= -u -n/) caused by getopt_long()
   internal state corruption after a refactoring.

* tag 'trace-tools-v7.1-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  rtla: Fix parsing of multi-character short options

6 files changed, 32 insertions, 36 deletions

diff --git a/tools/tracing/rtla/src/common.c b/tools/tracing/rtla/src/common.c
index 35e3d3aa922e..bc9d01ddd102 100644
--- a/tools/tracing/rtla/src/common.c
+++ b/tools/tracing/rtla/src/common.c
@@ -84,37 +84,20 @@ int getopt_auto(int argc, char **argv, const struct option *long_opts)
 }
 
 /*
- * common_parse_options - parse common command line options
+ * set_common_option - set common options
  *
+ * @c: option character
  * @argc: argument count
  * @argv: argument vector
  * @common: common parameters structure
  *
  * Parse command line options that are common to all rtla tools.
  *
- * Returns: non zero if a common option was parsed, or 0
- * if the option should be handled by tool-specific parsing.
+ * Returns: 1 if the option was set, 0 otherwise.
  */
-int common_parse_options(int argc, char **argv, struct common_params *common)
+int set_common_option(int c, int argc, char **argv, struct common_params *common)
 {
 	struct trace_events *tevent;
-	int saved_state = optind;
-	int c;
-
-	static struct option long_options[] = {
-		{"cpus",                required_argument,      0, 'c'},
-		{"cgroup",              optional_argument,      0, 'C'},
-		{"debug",               no_argument,            0, 'D'},
-		{"duration",            required_argument,      0, 'd'},
-		{"event",               required_argument,      0, 'e'},
-		{"house-keeping",       required_argument,      0, 'H'},
-		{"priority",            required_argument,      0, 'P'},
-		{0, 0, 0, 0}
-	};
-
-	opterr = 0;
-	c = getopt_auto(argc, argv, long_options);
-	opterr = 1;
 
 	switch (c) {
 	case 'c':
@@ -154,11 +137,10 @@ int common_parse_options(int argc, char **argv, struct common_params *common)
 		common->set_sched = 1;
 		break;
 	default:
-		optind = saved_state;
 		return 0;
 	}
 
-	return c;
+	return 1;
 }
 
 /*
diff --git a/tools/tracing/rtla/src/common.h b/tools/tracing/rtla/src/common.h
index 51665db4ffce..8921807bda98 100644
--- a/tools/tracing/rtla/src/common.h
+++ b/tools/tracing/rtla/src/common.h
@@ -178,7 +178,17 @@ int osnoise_set_stop_total_us(struct osnoise_context *context,
 			      long long stop_total_us);
 
 int getopt_auto(int argc, char **argv, const struct option *long_opts);
-int common_parse_options(int argc, char **argv, struct common_params *common);
+
+#define COMMON_OPTIONS \
+	{"cpus",                required_argument,      0, 'c'},\
+	{"cgroup",              optional_argument,      0, 'C'},\
+	{"debug",               no_argument,            0, 'D'},\
+	{"duration",            required_argument,      0, 'd'},\
+	{"event",               required_argument,      0, 'e'},\
+	{"house-keeping",       required_argument,      0, 'H'},\
+	{"priority",            required_argument,      0, 'P'}
+int set_common_option(int c, int argc, char **argv, struct common_params *common);
+
 int common_apply_config(struct osnoise_tool *tool, struct common_params *params);
 int top_main_loop(struct osnoise_tool *tool);
 int hist_main_loop(struct osnoise_tool *tool);
diff --git a/tools/tracing/rtla/src/osnoise_hist.c b/tools/tracing/rtla/src/osnoise_hist.c
index 8ad816b80265..cb4ce58c5987 100644
--- a/tools/tracing/rtla/src/osnoise_hist.c
+++ b/tools/tracing/rtla/src/osnoise_hist.c
@@ -475,6 +475,7 @@ static struct common_params
 
 	while (1) {
 		static struct option long_options[] = {
+			COMMON_OPTIONS,
 			{"auto",		required_argument,	0, 'a'},
 			{"bucket-size",		required_argument,	0, 'b'},
 			{"entries",		required_argument,	0, 'E'},
@@ -498,15 +499,15 @@ static struct common_params
 			{0, 0, 0, 0}
 		};
 
-		if (common_parse_options(argc, argv, &params->common))
-			continue;
-
 		c = getopt_auto(argc, argv, long_options);
 
 		/* detect the end of the options. */
 		if (c == -1)
 			break;
 
+		if (set_common_option(c, argc, argv, &params->common))
+			continue;
+
 		switch (c) {
 		case 'a':
 			/* set sample stop to auto_thresh */
diff --git a/tools/tracing/rtla/src/osnoise_top.c b/tools/tracing/rtla/src/osnoise_top.c
index 244bdce022ad..e65312ec26c4 100644
--- a/tools/tracing/rtla/src/osnoise_top.c
+++ b/tools/tracing/rtla/src/osnoise_top.c
@@ -328,6 +328,7 @@ struct common_params *osnoise_top_parse_args(int argc, char **argv)
 
 	while (1) {
 		static struct option long_options[] = {
+			COMMON_OPTIONS,
 			{"auto",		required_argument,	0, 'a'},
 			{"help",		no_argument,		0, 'h'},
 			{"period",		required_argument,	0, 'p'},
@@ -346,15 +347,15 @@ struct common_params *osnoise_top_parse_args(int argc, char **argv)
 			{0, 0, 0, 0}
 		};
 
-		if (common_parse_options(argc, argv, &params->common))
-			continue;
-
 		c = getopt_auto(argc, argv, long_options);
 
 		/* Detect the end of the options. */
 		if (c == -1)
 			break;
 
+		if (set_common_option(c, argc, argv, &params->common))
+			continue;
+
 		switch (c) {
 		case 'a':
 			/* set sample stop to auto_thresh */
diff --git a/tools/tracing/rtla/src/timerlat_hist.c b/tools/tracing/rtla/src/timerlat_hist.c
index 79142af4f566..4b6708e333b8 100644
--- a/tools/tracing/rtla/src/timerlat_hist.c
+++ b/tools/tracing/rtla/src/timerlat_hist.c
@@ -785,6 +785,7 @@ static struct common_params
 
 	while (1) {
 		static struct option long_options[] = {
+			COMMON_OPTIONS,
 			{"auto",		required_argument,	0, 'a'},
 			{"bucket-size",		required_argument,	0, 'b'},
 			{"entries",		required_argument,	0, 'E'},
@@ -819,11 +820,11 @@ static struct common_params
 			{0, 0, 0, 0}
 		};
 
-		if (common_parse_options(argc, argv, &params->common))
-			continue;
-
 		c = getopt_auto(argc, argv, long_options);
 
+		if (set_common_option(c, argc, argv, &params->common))
+			continue;
+
 		/* detect the end of the options. */
 		if (c == -1)
 			break;
diff --git a/tools/tracing/rtla/src/timerlat_top.c b/tools/tracing/rtla/src/timerlat_top.c
index 64cbdcc878b0..91f88bbebad9 100644
--- a/tools/tracing/rtla/src/timerlat_top.c
+++ b/tools/tracing/rtla/src/timerlat_top.c
@@ -549,6 +549,7 @@ static struct common_params
 
 	while (1) {
 		static struct option long_options[] = {
+			COMMON_OPTIONS,
 			{"auto",		required_argument,	0, 'a'},
 			{"help",		no_argument,		0, 'h'},
 			{"irq",			required_argument,	0, 'i'},
@@ -577,11 +578,11 @@ static struct common_params
 			{0, 0, 0, 0}
 		};
 
-		if (common_parse_options(argc, argv, &params->common))
-			continue;
-
 		c = getopt_auto(argc, argv, long_options);
 
+		if (set_common_option(c, argc, argv, &params->common))
+			continue;
+
 		/* detect the end of the options. */
 		if (c == -1)
 			break;