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Subject[PATCH 04/11] compat_ioctl: remove isdn ioctl translation
Date
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 and the Gigaset ISDN driver (implemented
on top of either CAPI or i4l) have some ioctl commands that are
correctly listed in fs/compat_ioctl.c.

We can trivially move all of those into the two corresponding
files 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.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
drivers/isdn/capi/capi.c | 31 +++++++++++++++++++++++++++++++
drivers/isdn/gigaset/interface.c | 10 ++++++++++
fs/compat_ioctl.c | 22 ----------------------
3 files changed, 41 insertions(+), 22 deletions(-)

diff --git a/drivers/isdn/capi/capi.c b/drivers/isdn/capi/capi.c
index ef5560b848ab..4851dc3941eb 100644
--- a/drivers/isdn/capi/capi.c
+++ b/drivers/isdn/capi/capi.c
@@ -942,6 +942,34 @@ 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 {
+ unsigned long 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;
@@ -988,6 +1016,9 @@ 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/drivers/isdn/gigaset/interface.c b/drivers/isdn/gigaset/interface.c
index 600c79b030cd..faae8ae54802 100644
--- a/drivers/isdn/gigaset/interface.c
+++ b/drivers/isdn/gigaset/interface.c
@@ -233,6 +233,13 @@ static int if_ioctl(struct tty_struct *tty,
return retval;
}

+#ifdef CONFIG_COMPAT
+static long if_compat_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg)
+{
+ return if_ioctl(tty, cmd, (unsigned long)compat_ptr(arg));
+}
+#endif
+
static int if_tiocmget(struct tty_struct *tty)
{
struct cardstate *cs = tty->driver_data;
@@ -472,6 +479,9 @@ static const struct tty_operations if_ops = {
.open = if_open,
.close = if_close,
.ioctl = if_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = if_compat_ioctl,
+#endif
.write = if_write,
.write_room = if_write_room,
.chars_in_buffer = if_chars_in_buffer,
diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c
index 875516658c39..7d8c5722fd0a 100644
--- a/fs/compat_ioctl.c
+++ b/fs/compat_ioctl.c
@@ -61,9 +61,6 @@
#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>
@@ -670,25 +667,6 @@ COMPATIBLE_IOCTL(HIDPCONNADD)
COMPATIBLE_IOCTL(HIDPCONNDEL)
COMPATIBLE_IOCTL(HIDPGETCONNLIST)
COMPATIBLE_IOCTL(HIDPGETCONNINFO)
-/* 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)
-/* Siemens Gigaset */
-COMPATIBLE_IOCTL(GIGASET_REDIR)
-COMPATIBLE_IOCTL(GIGASET_CONFIG)
-COMPATIBLE_IOCTL(GIGASET_BRKCHARS)
-COMPATIBLE_IOCTL(GIGASET_VERSION)
/* Misc. */
COMPATIBLE_IOCTL(0x41545900) /* ATYIO_CLKR */
COMPATIBLE_IOCTL(0x41545901) /* ATYIO_CLKW */
--
2.18.0
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