nvme-cli/0005-util-Fix-suffix_si_parse-to-parse-no-decimal-point-b.patch

From 94d6c2b5088292e101da3e1d078e155a5af32f56 Mon Sep 17 00:00:00 2001
From: Tokunori Ikegami <ikegami.t@gmail.com>
Date: Sun, 14 May 2023 17:39:00 +0900
Subject: [PATCH] util: Fix suffix_si_parse to parse no decimal point but
 suffix value correctly

For example create-ns command --ncap-si paramter value 800G parsed to 0 as invalid value.

Signed-off-by: Tokunori Ikegami <ikegami.t@gmail.com>
---
 unit/test-suffix-si-parse.c |  6 +++++
 util/suffix.c               | 50 +++++++++++++++++++++++++++----------
 2 files changed, 43 insertions(+), 13 deletions(-)

diff --git a/unit/test-suffix-si-parse.c b/unit/test-suffix-si-parse.c
index bc924552..54cff0e6 100644
--- a/unit/test-suffix-si-parse.c
+++ b/unit/test-suffix-si-parse.c
@@ -43,6 +43,12 @@ static struct tonum_test tonum_tests[] = {
 	{ "2,33", 0, -EINVAL },
 	{ "3..3", 0, -EINVAL },
 	{ "123.12MM", 0, -EINVAL },
+	{ "800G", 800000000000, 0 },
+	{ "800GG", 0, -EINVAL },
+	{ "800G800", 0, -EINVAL },
+	{ "800.0G", 800000000000, 0 },
+	{ "800.G", 0, -EINVAL },
+	{ "800.", 0, -EINVAL },
 };
 
 void tonum_test(struct tonum_test *test)
diff --git a/util/suffix.c b/util/suffix.c
index 8ed080d4..f010f3b6 100644
--- a/util/suffix.c
+++ b/util/suffix.c
@@ -40,6 +40,7 @@
 #include <float.h>
 #include <limits.h>
 #include <locale.h>
+#include <stdio.h>
 
 static struct si_suffix {
 	long double magnitude;
@@ -68,11 +69,26 @@ const char *suffix_si_get(double *value)
 	return suffix;
 }
 
+static bool suffix_si_check(const char val)
+{
+	int i;
+	struct si_suffix *s;
+
+	for (i = 0; i < ARRAY_SIZE(si_suffixes); i++) {
+		s = &si_suffixes[i];
+
+		if (val == *s->suffix)
+			return true;
+	}
+
+	return false;
+}
+
 int suffix_si_parse(const char *str, char **endptr, uint64_t *val)
 {
-	unsigned long long num, frac;
+	unsigned long long num, frac = 0;
 	char *sep, *tmp;
-	int frac_len, len, i;
+	int frac_len = 0, len, i;
 
 	num = strtoull(str, endptr, 0);
 	if (str == *endptr ||
@@ -93,23 +109,31 @@ int suffix_si_parse(const char *str, char **endptr, uint64_t *val)
 		len = 0;
 
 	for (i = 0; i < len; i++) {
+		if (suffix_si_check((*endptr)[i]))
+			break;
 		if (((*endptr)[i] == '\0') || (*endptr)[i] != sep[i])
 			return -EINVAL;
 	}
-	*endptr += len;
-	tmp = *endptr;
 
-	/* extract the digits after decimal point */
-	frac = strtoull(tmp, endptr, 0);
-	if (tmp == *endptr ||
-	    ((frac == ULLONG_MAX) && errno == ERANGE))
-		return -EINVAL;
+	if (suffix_si_check((*endptr)[i])) {
+		if ((*endptr)[i + 1] != '\0')
+			return -EINVAL;
+	} else {
+		*endptr += len;
+		tmp = *endptr;
+
+		/* extract the digits after decimal point */
+		frac = strtoull(tmp, endptr, 0);
+		if (tmp == *endptr ||
+		    ((frac == ULLONG_MAX) && errno == ERANGE))
+			return -EINVAL;
 
-	/* test that we have max one character as suffix */
-	if ((*endptr)[0] != '\0' && (*endptr)[1] != '\0')
-		return -EINVAL;
+		/* test that we have max one character as suffix */
+		if ((*endptr)[0] != '\0' && (*endptr)[1] != '\0')
+			return -EINVAL;
 
-	frac_len = *endptr - tmp;
+		frac_len = *endptr - tmp;
+	}
 
 	for (i = 0; i < ARRAY_SIZE(si_suffixes); i++) {
 		struct si_suffix *s = &si_suffixes[i];
-- 
2.39.3