Author: hselasky
Date: Wed Jun 20 06:57:59 2018
New Revision: 335433
URL: https://svnweb.freebsd.org/changeset/base/335433
Log:
MFC r334958:
Implement the kstrtobool() and kstrtobool_from_user() functions
in the LinuxKPI.
Submitted by: Johannes Lundberg <johal...@gmail.com>
Sponsored by: Mellanox Technologies
Sponsored by: Limelight Networks
Modified:
stable/11/sys/compat/linuxkpi/common/include/linux/kernel.h
Directory Properties:
stable/11/ (props changed)
Modified: stable/11/sys/compat/linuxkpi/common/include/linux/kernel.h
==============================================================================
--- stable/11/sys/compat/linuxkpi/common/include/linux/kernel.h Wed Jun 20
06:57:14 2018 (r335432)
+++ stable/11/sys/compat/linuxkpi/common/include/linux/kernel.h Wed Jun 20
06:57:59 2018 (r335433)
@@ -50,7 +50,9 @@
#include <linux/types.h>
#include <linux/jiffies.h>
#include <linux/log2.h>
+
#include <asm/byteorder.h>
+#include <asm/uaccess.h>
#include <machine/stdarg.h>
@@ -370,6 +372,46 @@ kstrtou32(const char *cp, unsigned int base, u32 *res)
if (temp != (u32)temp)
return (-ERANGE);
return (0);
+}
+
+static inline int
+kstrtobool(const char *s, bool *res)
+{
+ int len;
+
+ if (s == NULL || (len = strlen(s)) == 0 || res == NULL)
+ return (-EINVAL);
+
+ /* skip newline character, if any */
+ if (s[len - 1] == '\n')
+ len--;
+
+ if (len == 1 && strchr("yY1", s[0]) != NULL)
+ *res = true;
+ else if (len == 1 && strchr("nN0", s[0]) != NULL)
+ *res = false;
+ else if (strncasecmp("on", s, len) == 0)
+ *res = true;
+ else if (strncasecmp("off", s, len) == 0)
+ *res = false;
+ else
+ return (-EINVAL);
+
+ return (0);
+}
+
+static inline int
+kstrtobool_from_user(const char __user *s, size_t count, bool *res)
+{
+ char buf[8] = {};
+
+ if (count > (sizeof(buf) - 1))
+ count = (sizeof(buf) - 1);
+
+ if (copy_from_user(buf, s, count))
+ return (-EFAULT);
+
+ return (kstrtobool(buf, res));
}
#define min(x, y) ((x) < (y) ? (x) : (y))
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