Date: Fri, 19 Nov 2021 00:02:45 GMT From: "Bjoern A. Zeeb" <bz@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: 4459c162792b - stable/13 - LinuxKPI: add kstrtou8() and kstrtou8_from_user() to kernel.h Message-ID: <202111190002.1AJ02jUv072655@gitrepo.freebsd.org>
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The branch stable/13 has been updated by bz: URL: https://cgit.FreeBSD.org/src/commit/?id=4459c162792bd50296ccaf664f86fe7b748fc81a commit 4459c162792bd50296ccaf664f86fe7b748fc81a Author: Bjoern A. Zeeb <bz@FreeBSD.org> AuthorDate: 2021-10-22 11:04:36 +0000 Commit: Bjoern A. Zeeb <bz@FreeBSD.org> CommitDate: 2021-11-19 00:01:26 +0000 LinuxKPI: add kstrtou8() and kstrtou8_from_user() to kernel.h Analogous to the other sized version of kstrto[u]<type>() and kstrtobool_from_user() add the "u8" versions needed by a driver. (cherry picked from commit b382b78503b56ad6b787b995b46418db27adaa61) --- sys/compat/linuxkpi/common/include/linux/kernel.h | 33 +++++++++++++++++++++++ 1 file changed, 33 insertions(+) diff --git a/sys/compat/linuxkpi/common/include/linux/kernel.h b/sys/compat/linuxkpi/common/include/linux/kernel.h index 0909e7fb78f3..c67a9b8e22b0 100644 --- a/sys/compat/linuxkpi/common/include/linux/kernel.h +++ b/sys/compat/linuxkpi/common/include/linux/kernel.h @@ -396,6 +396,24 @@ kstrtouint(const char *cp, unsigned int base, unsigned int *res) return (0); } +static inline int +kstrtou8(const char *cp, unsigned int base, u8 *res) +{ + char *end; + unsigned long temp; + + *res = temp = strtoul(cp, &end, base); + + /* skip newline character, if any */ + if (*end == '\n') + end++; + if (*cp == 0 || *end != 0) + return (-EINVAL); + if (temp != (u8)temp) + return (-ERANGE); + return (0); +} + static inline int kstrtou16(const char *cp, unsigned int base, u16 *res) { @@ -487,6 +505,21 @@ kstrtobool_from_user(const char __user *s, size_t count, bool *res) return (kstrtobool(buf, res)); } +static inline int +kstrtou8_from_user(const char __user *s, size_t count, unsigned int base, + u8 *p) +{ + char buf[8] = {}; + + if (count > (sizeof(buf) - 1)) + count = (sizeof(buf) - 1); + + if (copy_from_user(buf, s, count)) + return (-EFAULT); + + return (kstrtou8(buf, base, p)); +} + #define min(x, y) ((x) < (y) ? (x) : (y)) #define max(x, y) ((x) > (y) ? (x) : (y))
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