From: Peter Rajnoha <prajnoha@redhat.com>
Add devname:mapper/control and MAPPER_CTRL_MINOR module alias
to support dm-mod module autoloading.
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Peter Rajnoha <prajnoha@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
---
Documentation/devices.txt | 1 +
drivers/md/dm-ioctl.c | 7 +++++--
include/linux/dm-ioctl.h | 1 +
include/linux/miscdevice.h | 1 +
4 files changed, 8 insertions(+), 2 deletions(-)
Index: linux-2.6.35/Documentation/devices.txt
===================================================================
--- linux-2.6.35.orig/Documentation/devices.txt
+++ linux-2.6.35/Documentation/devices.txt
@@ -445,6 +445,7 @@ Your cooperation is appreciated.
233 = /dev/kmview View-OS A process with a view
234 = /dev/btrfs-control Btrfs control device
235 = /dev/autofs Autofs control device
+ 236 = /dev/mapper/control Device-Mapper control device
240-254 Reserved for local use
255 Reserved for MISC_DYNAMIC_MINOR
Index: linux-2.6.35/drivers/md/dm-ioctl.c
===================================================================
--- linux-2.6.35.orig/drivers/md/dm-ioctl.c
+++ linux-2.6.35/drivers/md/dm-ioctl.c
@@ -1599,12 +1599,15 @@ static const struct file_operations _ctl
};
static struct miscdevice _dm_misc = {
- .minor = MISC_DYNAMIC_MINOR,
+ .minor = MAPPER_CTRL_MINOR,
.name = DM_NAME,
- .nodename = "mapper/control",
+ .nodename = DM_DIR "/" DM_CONTROL_NODE,
.fops = &_ctl_fops
};
+MODULE_ALIAS_MISCDEV(MAPPER_CTRL_MINOR);
+MODULE_ALIAS("devname:" DM_DIR "/" DM_CONTROL_NODE);
+
/*
* Create misc character device and link to DM_DIR/control.
*/
Index: linux-2.6.35/include/linux/dm-ioctl.h
===================================================================
--- linux-2.6.35.orig/include/linux/dm-ioctl.h
+++ linux-2.6.35/include/linux/dm-ioctl.h
@@ -11,6 +11,7 @@
#include <linux/types.h>
#define DM_DIR "mapper" /* Slashes not supported */
+#define DM_CONTROL_NODE "control"
#define DM_MAX_TYPE_NAME 16
#define DM_NAME_LEN 128
#define DM_UUID_LEN 129
Index: linux-2.6.35/include/linux/miscdevice.h
===================================================================
--- linux-2.6.35.orig/include/linux/miscdevice.h
+++ linux-2.6.35/include/linux/miscdevice.h
@@ -38,6 +38,7 @@
#define KVM_MINOR 232
#define BTRFS_MINOR 234
#define AUTOFS_MINOR 235
+#define MAPPER_CTRL_MINOR 236
#define MISC_DYNAMIC_MINOR 255
struct device;