Date: Wed, 20 Jun 2018 06:57:59 +0000 (UTC) From: Hans Petter Selasky <hselasky@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r335433 - stable/11/sys/compat/linuxkpi/common/include/linux Message-ID: <201806200657.w5K6vxe2032055@repo.freebsd.org>
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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 <johalun0@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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