Significance of device_attribute in the show/store function in sysfs.

ssgg2 · 11-13-2019, 11:27 PM

What is the significance of device_attribute in the show and store function in the sysfs?

Code:

ssize_t (*show)(struct device *dev, struct device_attribute *attr, char *buf);

I did not get any example where this parameter is being used.
I just want to know that what device_attirbute is doing here.

Can someone please help me to understand this?

rtmistler · 11-14-2019, 06:46 AM

I don't know but there is documentation for the sysfs, https://github.com/torvalds/linux/bl...tems/sysfs.txt and it covers the device attribute. I've found a lot of things like that to be difficult reading and that I've had to browse that, go back to the code, and iterate on that until I got the concept.