Add ddi_copyin/ddi_copyout support for fake kernel originated ioctls.

2 files changed, 30 insertions, 0 deletions

diff --git a/include/sys/sunddi.h b/include/sys/sunddi.h
index 404b14b38..c1773f504 100644
--- a/include/sys/sunddi.h
+++ b/include/sys/sunddi.h
@@ -213,6 +213,9 @@ extern int ddi_strtol(const char *, char **, int, long *);
 extern int ddi_strtoull(const char *, char **, int, unsigned long long *);
 extern int ddi_strtoll(const char *, char **, int, long long *);
 
+extern int ddi_copyin(const void *from, void *to, size_t len, int flags);
+extern int ddi_copyout(const void *from, void *to, size_t len, int flags);
+
 static __inline__ void ddi_report_dev(dev_info_t *d) { }
 static __inline__ void ddi_prop_remove_all(dev_info_t *dip) { }
 
diff --git a/module/spl/spl-generic.c b/module/spl/spl-generic.c
index 568d40635..b81dabc56 100644
--- a/module/spl/spl-generic.c
+++ b/module/spl/spl-generic.c
@@ -35,6 +35,7 @@
 #include <sys/proc.h>
 #include <sys/kstat.h>
 #include <sys/utsname.h>
+#include <sys/file.h>
 #include <linux/kmod.h>
 
 #ifdef DEBUG_SUBSYSTEM
@@ -226,6 +227,32 @@ EXPORT_SYMBOL(ddi_strtol);
 EXPORT_SYMBOL(ddi_strtoll);
 EXPORT_SYMBOL(ddi_strtoull);
 
+int
+ddi_copyin(const void *from, void *to, size_t len, int flags)
+{
+	/* Fake ioctl() issued by kernel, 'from' is a kernel address */
+	if (flags & FKIOCTL) {
+		memcpy(to, from, len);
+		return 0;
+	}
+
+	return copyin(from, to, len);
+}
+EXPORT_SYMBOL(ddi_copyin);
+
+int
+ddi_copyout(const void *from, void *to, size_t len, int flags)
+{
+	/* Fake ioctl() issued by kernel, 'from' is a kernel address */
+	if (flags & FKIOCTL) {
+		memcpy(to, from, len);
+		return 0;
+	}
+
+	return copyout(from, to, len);
+}
+EXPORT_SYMBOL(ddi_copyout);
+
 struct new_utsname *__utsname(void)
 {
 #ifdef HAVE_INIT_UTSNAME