On Mon, Nov 26 2012, Andrzej Pietrasiewicz <andrzej.p@xxxxxxxxxxx> wrote: > In some parts of the kernel (e.g. planned configfs integration into usb > gadget) there is a need to programmatically create config groups > (directories) but it would be preferable to disallow creating them by > the user. This is more or less what default_groups used to be for. > But e.g. in the mass storage gadget, after storing the number of > luns (logical units) into some configfs attribute, the corresponding lun# > directories should be created, their number is not known up front so > default_groups are no good for this. > > Example: > > $ echo 3 > /cfg/..../mass_storage/luns > > causes > > /cfg/....../mass_storage/lun0 > /cfg/....../mass_storage/lun1 > /cfg/....../mass_storage/lun2 > > to be created. Yet > > $ mkdir /cfg/..../mass_storage/<any name> > > should not be allowed. > > With create_group exported it is very easily achieved: make_group and make_item > are set to NULL in mass_storage's config_group, yet the kernel can > create_groups at will. I think the above description should be part of the commit message. :) -- Best regards, _ _ .o. | Liege of Serenely Enlightened Majesty of o' \,=./ `o ..o | Computer Science, Michał “mina86” Nazarewicz (o o) ooo +----<email/xmpp: mpn@xxxxxxxxxx>--------------ooO--(_)--Ooo--
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