Commit 06e1721d authored by Carlos Llamas's avatar Carlos Llamas Committed by Greg Kroah-Hartman
Browse files

docs: binderfs: add section about feature files 



Document how binder feature files can be used to determine whether a
feature is supported by the binder driver. "oneway_spam_detection" is
used as an example as it is the first available feature file.

Acked-by: default avatarChristian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: default avatarCarlos Llamas <cmllamas@google.com>
Link: https://lore.kernel.org/r/20210715031805.1725878-2-cmllamas@google.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent fc470abf

Documentation/admin-guide/binderfs.rst

+13 −0
Original line number Diff line number Diff line
@@ -72,3 +72,16 @@ that the `rm() <rm_>`_ tool can be used to delete them. Note that the 
``binder-control`` device cannot be deleted since this would make the binderfs

instance unusable.  The ``binder-control`` device will be deleted when the

binderfs instance is unmounted and all references to it have been dropped.



Binder features

---------------



Assuming an instance of binderfs has been mounted at ``/dev/binderfs``, the

features supported by the binder driver can be located under

``/dev/binderfs/features/``. The presence of individual files can be tested

to determine whether a particular feature is supported by the driver.



Example::



        cat /dev/binderfs/features/oneway_spam_detection

        1