util-lib: add parse_percent_unbounded() for percentages over 100% (#3886)

This permits CPUQuota to accept greater values as documented.

4 files changed, 12 insertions, 4 deletions

diff --git a/src/basic/parse-util.c b/src/basic/parse-util.c
index 503a895731..11849ade0b 100644
--- a/src/basic/parse-util.c
+++ b/src/basic/parse-util.c
@@ -533,7 +533,7 @@ int parse_fractional_part_u(const char **p, size_t digits, unsigned *res) {
         return 0;
 }
 
-int parse_percent(const char *p) {
+int parse_percent_unbounded(const char *p) {
         const char *pc, *n;
         unsigned v;
         int r;
@@ -546,8 +546,15 @@ int parse_percent(const char *p) {
         r = safe_atou(n, &v);
         if (r < 0)
                 return r;
+
+        return (int) v;
+}
+
+int parse_percent(const char *p) {
+        int v = parse_percent_unbounded(p);
+
         if (v > 100)
                 return -ERANGE;
 
-        return (int) v;
+        return v;
 }
diff --git a/src/basic/parse-util.h b/src/basic/parse-util.h
index 73441bb6fd..f0fa5f9752 100644
--- a/src/basic/parse-util.h
+++ b/src/basic/parse-util.h
@@ -106,4 +106,5 @@ int safe_atod(const char *s, double *ret_d);
 
 int parse_fractional_part_u(const char **s, size_t digits, unsigned *res);
 
+int parse_percent_unbounded(const char *p);
 int parse_percent(const char *p);
diff --git a/src/core/load-fragment.c b/src/core/load-fragment.c
index e8cb3a4249..d5f035b67f 100644
--- a/src/core/load-fragment.c
+++ b/src/core/load-fragment.c
@@ -2903,7 +2903,7 @@ int config_parse_cpu_quota(
                 return 0;
         }
 
-        r = parse_percent(rvalue);
+        r = parse_percent_unbounded(rvalue);
         if (r <= 0) {
                 log_syntax(unit, LOG_ERR, filename, line, r, "CPU quota '%s' invalid. Ignoring.", rvalue);
                 return 0;
diff --git a/src/shared/bus-unit-util.c b/src/shared/bus-unit-util.c
index 14bf8ad627..589f9d46e9 100644
--- a/src/shared/bus-unit-util.c
+++ b/src/shared/bus-unit-util.c
@@ -84,7 +84,7 @@ int bus_append_unit_property_assignment(sd_bus_message *m, const char *assignmen
                 if (isempty(eq))
                         r = sd_bus_message_append(m, "sv", "CPUQuotaPerSecUSec", "t", USEC_INFINITY);
                 else {
-                        r = parse_percent(eq);
+                        r = parse_percent_unbounded(eq);
                         if (r <= 0) {
                                 log_error_errno(r, "CPU quota '%s' invalid.", eq);
                                 return -EINVAL;