Commit 11dcb103 authored by Martin K. Petersen's avatar Martin K. Petersen Committed by Herbert Xu
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crc-t10dif: Allow current transform to be inspected in sysfs 



Add a way to print the currently active CRC algorithm in:

	/sys/module/crc_t10dif/parameters/transform

Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent b7637754

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");