How to store an array on sysfs in Linux kernel module?

Question

I am writing Linux Kernel module, where I'm creating some sysfs files to store variables.

But I need to implement arrays, something like:

struct ats {
   struct attribute attr;
   unsigned long value[5];
};

struct ats m_ats = {
   .attr.name="m_ats",
   .attr.mode = 0644,
   .value[0] = 0,
   .value[1] = 0,
   .value[2] = 0,
   .value[3] = 0,
   .value[4] = 0,
};

Is there a way to do that? How would be the show, store, module_init, module_exit functions?

Answer 1

You have to do it manually. You can use sscanf on the incoming string, parse the input and store each value in the array slot. Something like this:

sscanf(input_string, "%d %d %d", value[0], value[1], value[3])