Re: Create proc entry under /proc/sys/kernel

From: RuoMu Hu
Date: Sun Jun 08 2008 - 13:45:33 EST


Alexey Dobriyan wrote:
On Sun, Jun 08, 2008 at 04:00:57PM +0800, RuoMu Hu wrote:
Is it possible to create a proc entry under /proc/sys/kernel directly by create_proc_read_entry in the way shown below?

No longer.

test_pde = create_proc_read_entry("/proc/sys/kernel/test", 0, NULL,
test_read_proc, NULL);
if (test_pde == NULL) {
printk(KERN_ERR "Failed to create the test proc file.\n");
return -ENOMEM;
}

I'm using this in my kernel module but create_proc_read_entry always returns fail, while there's no problem creating proc entries directly under /proc. The kernel source I'm building my kernel module against is 2.6.25.4.

Use register_sysctl_table() for sysctls.

Thank you for your hint, it really helped me.

Another question: Is it possible to add an entry under /proc/sys/kernel by register_sysctl_table() without modifying kernel source (adding an entry to the kern_table[] array in kernel/sysctl.c)?

Best regards,
Romu
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