compat_ioctl: move isdn/capi ioctl translation into driver

Neither the old isdn4linux interface nor the newer mISDN stack
ever had working 32-bit compat mode as far as I can tell.

However, the CAPI stack has some ioctl commands that are
correctly listed in fs/compat_ioctl.c.

We can trivially move all of those into the corresponding
file that implement the native handlers by adding a compat_ioctl
redirect to that.

I did notice that treating CAPI_MANUFACTURER_CMD() as compatible
is broken, so I'm also adding a handler for that, realizing that
in all likelyhood, nobody is ever going to call it.

Cc: Karsten Keil <isdn@linux-pingi.de>
Cc: netdev@vger.kernel.org
Cc: isdn4linux@listserv.isdn4linux.de
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

diff --git a/drivers/isdn/capi/capi.c b/drivers/isdn/capi/capi.c
index c92b405..6fbe394 100644 (file)
--- a/drivers/isdn/capi/capi.c
+++ b/drivers/isdn/capi/capi.c
@@ -950,6 +950,34 @@ capi_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
        return ret;
 }
 
+#ifdef CONFIG_COMPAT
+static long
+capi_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+       int ret;
+
+       if (cmd == CAPI_MANUFACTURER_CMD) {
+               struct {
+                       compat_ulong_t cmd;
+                       compat_uptr_t data;
+               } mcmd32;
+
+               if (!capable(CAP_SYS_ADMIN))
+                       return -EPERM;
+               if (copy_from_user(&mcmd32, compat_ptr(arg), sizeof(mcmd32)))
+                       return -EFAULT;
+
+               mutex_lock(&capi_mutex);
+               ret = capi20_manufacturer(mcmd32.cmd, compat_ptr(mcmd32.data));
+               mutex_unlock(&capi_mutex);
+
+               return ret;
+       }
+
+       return capi_unlocked_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
+}
+#endif
+
 static int capi_open(struct inode *inode, struct file *file)
 {
        struct capidev *cdev;
@@ -996,6 +1024,9 @@ static const struct file_operations capi_fops =
        .write          = capi_write,
        .poll           = capi_poll,
        .unlocked_ioctl = capi_unlocked_ioctl,
+#ifdef CONFIG_COMPAT
+       .compat_ioctl   = capi_compat_ioctl,
+#endif
        .open           = capi_open,
        .release        = capi_release,
 };

diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c
index a4e8fb7..f3b4179 100644 (file)
--- a/fs/compat_ioctl.c
+++ b/fs/compat_ioctl.c
@@ -44,9 +44,6 @@
 #include <net/bluetooth/hci_sock.h>
 #include <net/bluetooth/rfcomm.h>
 
-#include <linux/capi.h>
-#include <linux/gigaset_dev.h>
-
 #ifdef CONFIG_BLOCK
 #include <linux/cdrom.h>
 #include <linux/fd.h>
@@ -681,20 +678,6 @@ COMPATIBLE_IOCTL(RFCOMMRELEASEDEV)
 COMPATIBLE_IOCTL(RFCOMMGETDEVLIST)
 COMPATIBLE_IOCTL(RFCOMMGETDEVINFO)
 COMPATIBLE_IOCTL(RFCOMMSTEALDLC)
-/* CAPI */
-COMPATIBLE_IOCTL(CAPI_REGISTER)
-COMPATIBLE_IOCTL(CAPI_GET_MANUFACTURER)
-COMPATIBLE_IOCTL(CAPI_GET_VERSION)
-COMPATIBLE_IOCTL(CAPI_GET_SERIAL)
-COMPATIBLE_IOCTL(CAPI_GET_PROFILE)
-COMPATIBLE_IOCTL(CAPI_MANUFACTURER_CMD)
-COMPATIBLE_IOCTL(CAPI_GET_ERRCODE)
-COMPATIBLE_IOCTL(CAPI_INSTALLED)
-COMPATIBLE_IOCTL(CAPI_GET_FLAGS)
-COMPATIBLE_IOCTL(CAPI_SET_FLAGS)
-COMPATIBLE_IOCTL(CAPI_CLR_FLAGS)
-COMPATIBLE_IOCTL(CAPI_NCCI_OPENCOUNT)
-COMPATIBLE_IOCTL(CAPI_NCCI_GETUNIT)
 /* Misc. */
 COMPATIBLE_IOCTL(PCIIOC_CONTROLLER)
 COMPATIBLE_IOCTL(PCIIOC_MMAP_IS_IO)