dm: allow autoloading of dm mod
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>
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@ -445,6 +445,7 @@ Your cooperation is appreciated.
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233 = /dev/kmview View-OS A process with a view
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233 = /dev/kmview View-OS A process with a view
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234 = /dev/btrfs-control Btrfs control device
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234 = /dev/btrfs-control Btrfs control device
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235 = /dev/autofs Autofs control device
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235 = /dev/autofs Autofs control device
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236 = /dev/mapper/control Device-Mapper control device
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240-254 Reserved for local use
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240-254 Reserved for local use
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255 Reserved for MISC_DYNAMIC_MINOR
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255 Reserved for MISC_DYNAMIC_MINOR
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@ -1599,12 +1599,15 @@ static const struct file_operations _ctl_fops = {
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};
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};
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static struct miscdevice _dm_misc = {
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static struct miscdevice _dm_misc = {
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.minor = MISC_DYNAMIC_MINOR,
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.minor = MAPPER_CTRL_MINOR,
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.name = DM_NAME,
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.name = DM_NAME,
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.nodename = "mapper/control",
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.nodename = DM_DIR "/" DM_CONTROL_NODE,
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.fops = &_ctl_fops
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.fops = &_ctl_fops
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};
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};
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MODULE_ALIAS_MISCDEV(MAPPER_CTRL_MINOR);
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MODULE_ALIAS("devname:" DM_DIR "/" DM_CONTROL_NODE);
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/*
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/*
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* Create misc character device and link to DM_DIR/control.
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* Create misc character device and link to DM_DIR/control.
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*/
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*/
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@ -11,6 +11,7 @@
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#include <linux/types.h>
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#include <linux/types.h>
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#define DM_DIR "mapper" /* Slashes not supported */
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#define DM_DIR "mapper" /* Slashes not supported */
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#define DM_CONTROL_NODE "control"
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#define DM_MAX_TYPE_NAME 16
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#define DM_MAX_TYPE_NAME 16
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#define DM_NAME_LEN 128
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#define DM_NAME_LEN 128
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#define DM_UUID_LEN 129
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#define DM_UUID_LEN 129
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@ -38,6 +38,7 @@
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#define KVM_MINOR 232
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#define KVM_MINOR 232
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#define BTRFS_MINOR 234
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#define BTRFS_MINOR 234
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#define AUTOFS_MINOR 235
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#define AUTOFS_MINOR 235
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#define MAPPER_CTRL_MINOR 236
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#define MISC_DYNAMIC_MINOR 255
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#define MISC_DYNAMIC_MINOR 255
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struct device;
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struct device;
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