CODEWITHSUNDEEP
linux-device-driversysfs
Jan
Jan

Reputation: 495

Recommended way to create many sysfs directories and attributes for a linux device driver

I need to create a whole bunch of attributes for a driver, which makes it impractical to allocate them statically (64 directories with 5 attributes each).

It looks like there are multiple ways to create directories in sysfs. One seems to be sysfs_create_dir_ns() and the other seems to be creating struct kobjects, add them to the sysfs and then add attributes to them.

Is there a recommended (or "best") way to do this?

Upvotes: 2

Views: 2129

Answers (1)

Jan
Jan

Reputation: 495

One possible way, which at least works if you only have to create one level of subdirectories, is using a struct attribute_group. This structure has a member name which - if not NULL - will be used as a directory in which the attributes listed in the attribute group will be inserted.

This does not, however, allow multiple layers of directories, because you don't have matching kobjects for the first level created by sysfs_create_group().

Upvotes: 2

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