[RFC 2/5] Memory subsystem fault injection tapset

[Anup C Shan <anupcshan at gmail dot com>]

/*
 * This tapset contains functions and parameters specific to the 
 * memory management subsystem of the kernel.
 */

function fij_add_gfp_wait_param()
{
	fij_add_option("ignore_gfp_wait",1,
			"inject failures only into non-sleep allocations")
}

function fij_get_gfp_wait()
%{
	THIS->__retvalue = __GFP_WAIT;
%}

function fij_should_fail_gfp_wait(flags:long)
{
	GFPWAIT = fij_get_gfp_wait()
	if (fij_params["ignore_gfp_wait"] == 1) {
		if (flags&GFPWAIT) {
			fij_logger(100,
				sprintf("Skipping on ignore_gfp_wait %d",
								flags&GFPWAIT))
			return 0
		} else
			fij_logger(100,
				sprintf("Continuing on ignore_gfp_wait %d",
								flags&GFPWAIT))
	}
	return 1
}

function fij_add_gfp_highmem_param()
{
	fij_add_option("ignore_gfp_highmem",1,
			"1 => inject failures highmem/user allocations")
}

function fij_get_gfp_highmem()
%{
	THIS->__retvalue = __GFP_HIGHMEM;
%}

function fij_should_fail_gfp_highmem(flags:long)
{
	GFPHIGHMEM = fij_get_gfp_highmem()
	if (fij_params["ignore_gfp_highmem"] == 1) {
		if (flags&GFPHIGHMEM) {
			fij_logger(100,
				sprintf("Skipping on ignore_gfp_highmem %d",
							flags&GFPHIGHMEM))
			return 0
		} else
			fij_logger(100,
				sprintf("Continuing on ignore_gfp_highmem %d"
							,flags&GFPHIGHMEM))
	}
	return 1
}