[PATCH] cuse: creat 'dead' device node for on-demand module loading

From: Tom Gundersen
Date: Mon Sep 09 2013 - 14:10:32 EST


This allows udev (or more recently systemd-tmpfiles) to create /dev/cuse on
boot, in the same way as /dev/fuse is currently created, and the corresponding
module to be loaded on first access.

The corresponding functionalty was introduced for fuse in commit 578454f.

Signed-off-by: Tom Gundersen <teg@xxxxxxx>
Cc: Kay Sievers <kay@xxxxxxxx>
Cc: Miklos Szeredi <miklos@xxxxxxxxxx>
---
fs/fuse/cuse.c | 5 ++++-
include/linux/miscdevice.h | 1 +
2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/fs/fuse/cuse.c b/fs/fuse/cuse.c
index adbfd66..24da581 100644
--- a/fs/fuse/cuse.c
+++ b/fs/fuse/cuse.c
@@ -589,11 +589,14 @@ static struct attribute *cuse_class_dev_attrs[] = {
ATTRIBUTE_GROUPS(cuse_class_dev);

static struct miscdevice cuse_miscdev = {
- .minor = MISC_DYNAMIC_MINOR,
+ .minor = CUSE_MINOR,
.name = "cuse",
.fops = &cuse_channel_fops,
};

+MODULE_ALIAS_MISCDEV(CUSE_MINOR);
+MODULE_ALIAS("devname:cuse");
+
static int __init cuse_init(void)
{
int i, rc;
diff --git a/include/linux/miscdevice.h b/include/linux/miscdevice.h
index cb35835..65c8619 100644
--- a/include/linux/miscdevice.h
+++ b/include/linux/miscdevice.h
@@ -39,6 +39,7 @@
#define MISC_MCELOG_MINOR 227
#define HPET_MINOR 228
#define FUSE_MINOR 229
+#define CUSE_MINOR 230
#define KVM_MINOR 232
#define BTRFS_MINOR 234
#define AUTOFS_MINOR 235
--
1.8.4

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