crc-t10dif: Allow current transform to be inspected in sysfs (11dcb103) · Commits · 戴 / test

Add a way to print the currently active CRC algorithm in: /sys/module/crc_t10dif/parameters/transform Signed-off-by:

lib/crc-t10dif.c

+11 −0

Original line number	Diff line number	Diff line
		@@ -107,6 +107,17 @@ static void __exit crc_t10dif_mod_fini(void)
		module_init(crc_t10dif_mod_init);
		module_exit(crc_t10dif_mod_fini);

		static int crc_t10dif_transform_show(char buffer, const struct kernel_param kp)
		{
		if (static_key_false(&crct10dif_fallback))
		return sprintf(buffer, "fallback\n");

		return sprintf(buffer, "%s\n",
		crypto_tfm_alg_driver_name(crypto_shash_tfm(crct10dif_tfm)));
		}

		module_param_call(transform, NULL, crc_t10dif_transform_show, NULL, 0644);

		MODULE_DESCRIPTION("T10 DIF CRC calculation");
		MODULE_LICENSE("GPL");
		MODULE_SOFTDEP("pre: crct10dif");