dm ioctl: move compat code

Move compat_ioctl handling into dm-ioctl.c.

Signed-off-by: Milan Broz <mbroz@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

drivers/md/dm-ioctl.c

@@ -15,6 +15,7 @@
 #include <linux/slab.h>
 #include <linux/dm-ioctl.h>
 #include <linux/hdreg.h>
+#include <linux/compat.h>
 
 #include <asm/uaccess.h>
 
@@ -1350,10 +1351,10 @@ static int copy_params(struct dm_ioctl __user *user, struct dm_ioctl **param)
 {
 	struct dm_ioctl tmp, *dmi;
 
-	if (copy_from_user(&tmp, user, sizeof(tmp)))
+	if (copy_from_user(&tmp, user, sizeof(tmp) - sizeof(tmp.data)))
 		return -EFAULT;
 
-	if (tmp.data_size < sizeof(tmp))
+	if (tmp.data_size < (sizeof(tmp) - sizeof(tmp.data)))
 		return -EINVAL;
 
 	dmi = vmalloc(tmp.data_size);
@@ -1474,8 +1475,18 @@ static long dm_ctl_ioctl(struct file *file, uint command, ulong u)
 	return (long)ctl_ioctl(command, (struct dm_ioctl __user *)u);
 }
 
+#ifdef CONFIG_COMPAT
+static long dm_compat_ctl_ioctl(struct file *file, uint command, ulong u)
+{
+	return (long)dm_ctl_ioctl(file, command, (ulong) compat_ptr(u));
+}
+#else
+#define dm_compat_ctl_ioctl NULL
+#endif
+
 static const struct file_operations _ctl_fops = {
 	.unlocked_ioctl	 = dm_ctl_ioctl,
+	.compat_ioctl = dm_compat_ctl_ioctl,
 	.owner	 = THIS_MODULE,
 };
 

fs/compat_ioctl.c

@@ -78,7 +78,6 @@
 #include <linux/mii.h>
 #include <linux/if_bonding.h>
 #include <linux/watchdog.h>
-#include <linux/dm-ioctl.h>
 
 #include <linux/soundcard.h>
 #include <linux/lp.h>
@@ -1993,39 +1992,6 @@ COMPATIBLE_IOCTL(STOP_ARRAY_RO)
 COMPATIBLE_IOCTL(RESTART_ARRAY_RW)
 COMPATIBLE_IOCTL(GET_BITMAP_FILE)
 ULONG_IOCTL(SET_BITMAP_FILE)
-/* DM */
-COMPATIBLE_IOCTL(DM_VERSION_32)
-COMPATIBLE_IOCTL(DM_REMOVE_ALL_32)
-COMPATIBLE_IOCTL(DM_LIST_DEVICES_32)
-COMPATIBLE_IOCTL(DM_DEV_CREATE_32)
-COMPATIBLE_IOCTL(DM_DEV_REMOVE_32)
-COMPATIBLE_IOCTL(DM_DEV_RENAME_32)
-COMPATIBLE_IOCTL(DM_DEV_SUSPEND_32)
-COMPATIBLE_IOCTL(DM_DEV_STATUS_32)
-COMPATIBLE_IOCTL(DM_DEV_WAIT_32)
-COMPATIBLE_IOCTL(DM_TABLE_LOAD_32)
-COMPATIBLE_IOCTL(DM_TABLE_CLEAR_32)
-COMPATIBLE_IOCTL(DM_TABLE_DEPS_32)
-COMPATIBLE_IOCTL(DM_TABLE_STATUS_32)
-COMPATIBLE_IOCTL(DM_LIST_VERSIONS_32)
-COMPATIBLE_IOCTL(DM_TARGET_MSG_32)
-COMPATIBLE_IOCTL(DM_DEV_SET_GEOMETRY_32)
-COMPATIBLE_IOCTL(DM_VERSION)
-COMPATIBLE_IOCTL(DM_REMOVE_ALL)
-COMPATIBLE_IOCTL(DM_LIST_DEVICES)
-COMPATIBLE_IOCTL(DM_DEV_CREATE)
-COMPATIBLE_IOCTL(DM_DEV_REMOVE)
-COMPATIBLE_IOCTL(DM_DEV_RENAME)
-COMPATIBLE_IOCTL(DM_DEV_SUSPEND)
-COMPATIBLE_IOCTL(DM_DEV_STATUS)
-COMPATIBLE_IOCTL(DM_DEV_WAIT)
-COMPATIBLE_IOCTL(DM_TABLE_LOAD)
-COMPATIBLE_IOCTL(DM_TABLE_CLEAR)
-COMPATIBLE_IOCTL(DM_TABLE_DEPS)
-COMPATIBLE_IOCTL(DM_TABLE_STATUS)
-COMPATIBLE_IOCTL(DM_LIST_VERSIONS)
-COMPATIBLE_IOCTL(DM_TARGET_MSG)
-COMPATIBLE_IOCTL(DM_DEV_SET_GEOMETRY)
 /* Big K */
 COMPATIBLE_IOCTL(PIO_FONT)
 COMPATIBLE_IOCTL(GIO_FONT)

include/linux/dm-ioctl.h

@@ -232,36 +232,6 @@ enum {
 	DM_DEV_SET_GEOMETRY_CMD
 };
 
-/*
- * The dm_ioctl struct passed into the ioctl is just the header
- * on a larger chunk of memory.  On x86-64 and other
- * architectures the dm-ioctl struct will be padded to an 8 byte
- * boundary so the size will be different, which would change the
- * ioctl code - yes I really messed up.  This hack forces these
- * architectures to have the correct ioctl code.
- */
-#ifdef CONFIG_COMPAT
-typedef char ioctl_struct[308];
-#define DM_VERSION_32       _IOWR(DM_IOCTL, DM_VERSION_CMD, ioctl_struct)
-#define DM_REMOVE_ALL_32    _IOWR(DM_IOCTL, DM_REMOVE_ALL_CMD, ioctl_struct)
-#define DM_LIST_DEVICES_32  _IOWR(DM_IOCTL, DM_LIST_DEVICES_CMD, ioctl_struct)
-
-#define DM_DEV_CREATE_32    _IOWR(DM_IOCTL, DM_DEV_CREATE_CMD, ioctl_struct)
-#define DM_DEV_REMOVE_32    _IOWR(DM_IOCTL, DM_DEV_REMOVE_CMD, ioctl_struct)
-#define DM_DEV_RENAME_32    _IOWR(DM_IOCTL, DM_DEV_RENAME_CMD, ioctl_struct)
-#define DM_DEV_SUSPEND_32   _IOWR(DM_IOCTL, DM_DEV_SUSPEND_CMD, ioctl_struct)
-#define DM_DEV_STATUS_32    _IOWR(DM_IOCTL, DM_DEV_STATUS_CMD, ioctl_struct)
-#define DM_DEV_WAIT_32      _IOWR(DM_IOCTL, DM_DEV_WAIT_CMD, ioctl_struct)
-
-#define DM_TABLE_LOAD_32    _IOWR(DM_IOCTL, DM_TABLE_LOAD_CMD, ioctl_struct)
-#define DM_TABLE_CLEAR_32   _IOWR(DM_IOCTL, DM_TABLE_CLEAR_CMD, ioctl_struct)
-#define DM_TABLE_DEPS_32    _IOWR(DM_IOCTL, DM_TABLE_DEPS_CMD, ioctl_struct)
-#define DM_TABLE_STATUS_32  _IOWR(DM_IOCTL, DM_TABLE_STATUS_CMD, ioctl_struct)
-#define DM_LIST_VERSIONS_32 _IOWR(DM_IOCTL, DM_LIST_VERSIONS_CMD, ioctl_struct)
-#define DM_TARGET_MSG_32    _IOWR(DM_IOCTL, DM_TARGET_MSG_CMD, ioctl_struct)
-#define DM_DEV_SET_GEOMETRY_32	_IOWR(DM_IOCTL, DM_DEV_SET_GEOMETRY_CMD, ioctl_struct)
-#endif
-
 #define DM_IOCTL 0xfd
 
 #define DM_VERSION       _IOWR(DM_IOCTL, DM_VERSION_CMD, struct dm_ioctl)
@@ -286,9 +256,9 @@ typedef char ioctl_struct[308];
 #define DM_DEV_SET_GEOMETRY	_IOWR(DM_IOCTL, DM_DEV_SET_GEOMETRY_CMD, struct dm_ioctl)
 
 #define DM_VERSION_MAJOR	4
-#define DM_VERSION_MINOR	12
+#define DM_VERSION_MINOR	13
 #define DM_VERSION_PATCHLEVEL	0
-#define DM_VERSION_EXTRA	"-ioctl (2007-10-02)"
+#define DM_VERSION_EXTRA	"-ioctl (2007-10-18)"
 
 /* Status bits */
 #define DM_READONLY_FLAG	(1 << 0) /* In/Out */