Messages in this thread Patch in this message | | | From | Seth Forshee <> | Subject | [RFC PATCH 09/11] misc: Make loop-control available to all user namespaces | Date | Wed, 14 May 2014 16:34:57 -0500 |
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Add a ns_global field to struct miscdevice to allow indicating that the created struct device should be global to all user namespaces, and set this flag for loop-control.
Signed-off-by: Seth Forshee <seth.forshee@canonical.com> --- drivers/block/loop.c | 1 + drivers/char/misc.c | 11 +++++++++-- include/linux/miscdevice.h | 1 + 3 files changed, 11 insertions(+), 2 deletions(-)
diff --git a/drivers/block/loop.c b/drivers/block/loop.c index f70a230a2945..f0e41a372c24 100644 --- a/drivers/block/loop.c +++ b/drivers/block/loop.c @@ -1813,6 +1813,7 @@ static struct miscdevice loop_misc = { .minor = LOOP_CTRL_MINOR, .name = "loop-control", .fops = &loop_ctl_fops, + .ns_global = true, }; MODULE_ALIAS_MISCDEV(LOOP_CTRL_MINOR); diff --git a/drivers/char/misc.c b/drivers/char/misc.c index ffa97d261cf3..5940ebd98023 100644 --- a/drivers/char/misc.c +++ b/drivers/char/misc.c @@ -205,8 +205,15 @@ int misc_register(struct miscdevice * misc) dev = MKDEV(MISC_MAJOR, misc->minor); - misc->this_device = device_create(misc_class, misc->parent, dev, - misc, "%s", misc->name); + if (misc->ns_global) + misc->this_device = device_create_global(misc_class, + misc->parent, dev, + misc, "%s", + misc->name); + else + misc->this_device = device_create(misc_class, misc->parent, dev, + misc, "%s", misc->name); + if (IS_ERR(misc->this_device)) { int i = DYNAMIC_MINORS - misc->minor - 1; if (i < DYNAMIC_MINORS && i >= 0) diff --git a/include/linux/miscdevice.h b/include/linux/miscdevice.h index 51e26f3cd3b3..a85782339fe2 100644 --- a/include/linux/miscdevice.h +++ b/include/linux/miscdevice.h @@ -62,6 +62,7 @@ struct miscdevice { struct device *this_device; const char *nodename; umode_t mode; + bool ns_global; }; extern int misc_register(struct miscdevice * misc); -- 1.9.1
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