compat: add kstrtou8_from_user

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

diff --git a/compat/compat-3.0.c b/compat/compat-3.0.c
index 312eea004a5e73ac5e70661c26722bc1006897f2..f517e9fbeec5858aa941f7dc4d3ee7acf4ddba8c 100644 (file)
--- a/compat/compat-3.0.c
+++ b/compat/compat-3.0.c
@@ -35,3 +35,28 @@ int mac_pton(const char *s, u8 *mac)
        return 1;
 }
 EXPORT_SYMBOL(mac_pton);
+
+#define kstrto_from_user(f, g, type)                                   \
+int f(const char __user *s, size_t count, unsigned int base, type *res)        \
+{                                                                      \
+       /* sign, base 2 representation, newline, terminator */          \
+       char buf[1 + sizeof(type) * 8 + 1 + 1];                         \
+                                                                       \
+       count = min(count, sizeof(buf) - 1);                            \
+       if (copy_from_user(buf, s, count))                              \
+               return -EFAULT;                                         \
+       buf[count] = '\0';                                              \
+       return g(buf, base, res);                                       \
+}                                                                      \
+EXPORT_SYMBOL(f)
+
+kstrto_from_user(kstrtoull_from_user,  kstrtoull,      unsigned long long);
+kstrto_from_user(kstrtoll_from_user,   kstrtoll,       long long);
+kstrto_from_user(kstrtoul_from_user,   kstrtoul,       unsigned long);
+kstrto_from_user(kstrtol_from_user,    kstrtol,        long);
+kstrto_from_user(kstrtouint_from_user, kstrtouint,     unsigned int);
+kstrto_from_user(kstrtoint_from_user,  kstrtoint,      int);
+kstrto_from_user(kstrtou16_from_user,  kstrtou16,      u16);
+kstrto_from_user(kstrtos16_from_user,  kstrtos16,      s16);
+kstrto_from_user(kstrtou8_from_user,   kstrtou8,       u8);
+kstrto_from_user(kstrtos8_from_user,   kstrtos8,       s8);

diff --git a/include/linux/compat-3.0.h b/include/linux/compat-3.0.h
index 7954ddb12d9ed66e6a22cd409863f008813b2dce..8c8720e0a5fc99e6ff9e7b107953d8d9985a00b4 100644 (file)
--- a/include/linux/compat-3.0.h
+++ b/include/linux/compat-3.0.h
@@ -48,6 +48,37 @@ struct bcma_device_id {
 
 int mac_pton(const char *s, u8 *mac);
 
+int __must_check kstrtoull_from_user(const char __user *s, size_t count, unsigned int base, unsigned long long *res);
+int __must_check kstrtoll_from_user(const char __user *s, size_t count, unsigned int base, long long *res);
+int __must_check kstrtoul_from_user(const char __user *s, size_t count, unsigned int base, unsigned long *res);
+int __must_check kstrtol_from_user(const char __user *s, size_t count, unsigned int base, long *res);
+int __must_check kstrtouint_from_user(const char __user *s, size_t count, unsigned int base, unsigned int *res);
+int __must_check kstrtoint_from_user(const char __user *s, size_t count, unsigned int base, int *res);
+int __must_check kstrtou16_from_user(const char __user *s, size_t count, unsigned int base, u16 *res);
+int __must_check kstrtos16_from_user(const char __user *s, size_t count, unsigned int base, s16 *res);
+int __must_check kstrtou8_from_user(const char __user *s, size_t count, unsigned int base, u8 *res);
+int __must_check kstrtos8_from_user(const char __user *s, size_t count, unsigned int base, s8 *res);
+
+static inline int __must_check kstrtou64_from_user(const char __user *s, size_t count, unsigned int base, u64 *res)
+{
+       return kstrtoull_from_user(s, count, base, res);
+}
+
+static inline int __must_check kstrtos64_from_user(const char __user *s, size_t count, unsigned int base, s64 *res)
+{
+       return kstrtoll_from_user(s, count, base, res);
+}
+
+static inline int __must_check kstrtou32_from_user(const char __user *s, size_t count, unsigned int base, u32 *res)
+{
+       return kstrtouint_from_user(s, count, base, res);
+}
+
+static inline int __must_check kstrtos32_from_user(const char __user *s, size_t count, unsigned int base, s32 *res)
+{
+       return kstrtoint_from_user(s, count, base, res);
+}
+
 #endif /* (LINUX_VERSION_CODE < KERNEL_VERSION(3,0,0)) */
 
 #endif /* LINUX_3_0_COMPAT_H */