LU-12262 llite: harden ll_sbi ll_flags

[fs/lustre-release.git] / libcfs / libcfs / linux / linux-prim.c

diff --git a/libcfs/libcfs/linux/linux-prim.c b/libcfs/libcfs/linux/linux-prim.c
index 1bdab05..5f2f6ae 100644 (file)
--- a/libcfs/libcfs/linux/linux-prim.c
+++ b/libcfs/libcfs/linux/linux-prim.c
@@ -187,6 +187,59 @@ struct kobject *kset_find_obj(struct kset *kset, const char *name)
 EXPORT_SYMBOL_GPL(kset_find_obj);
 #endif
 
+#ifndef HAVE_MATCH_WILDCARD
+/**
+ * match_wildcard: - parse if a string matches given wildcard pattern
+ * @pattern: wildcard pattern
+ * @str: the string to be parsed
+ *
+ * Description: Parse the string @str to check if matches wildcard
+ * pattern @pattern. The pattern may contain two type wildcardes:
+ *   '*' - matches zero or more characters
+ *   '?' - matches one character
+ * If it's matched, return true, else return false.
+ */
+bool match_wildcard(const char *pattern, const char *str)
+{
+       const char *s = str;
+       const char *p = pattern;
+       bool star = false;
+
+       while (*s) {
+               switch (*p) {
+               case '?':
+                       s++;
+                       p++;
+                       break;
+               case '*':
+                       star = true;
+                       str = s;
+                       if (!*++p)
+                               return true;
+                       pattern = p;
+                       break;
+               default:
+                       if (*s == *p) {
+                               s++;
+                               p++;
+                       } else {
+                               if (!star)
+                                       return false;
+                               str++;
+                               s = str;
+                               p = pattern;
+                       }
+                       break;
+               }
+       }
+
+       if (*p == '*')
+               ++p;
+       return !*p;
+}
+EXPORT_SYMBOL(match_wildcard);
+#endif /* !HAVE_MATCH_WILDCARD */
+
 #ifndef HAVE_KSTRTOBOOL_FROM_USER
 int kstrtobool_from_user(const char __user *s, size_t count, bool *res)
 {