scsi: core: Allow non-root users to perform ZBC commands

Allow users with read permissions to issue REPORT ZONE commands and users
with write permissions to manage zones on block devices supporting the ZBC
specification.

Link: https://lore.kernel.org/r/20200226170518.92963-2-ryanattard@ryanattard.infoSigned-off-by: Ryan Attard <ryanattard@ryanattard.info>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

block/scsi_ioctl.c

@@ -193,6 +193,10 @@ static void blk_set_cmd_filter_defaults(struct blk_cmd_filter *filter)
 	__set_bit(GPCMD_LOAD_UNLOAD, filter->write_ok);
 	__set_bit(GPCMD_SET_STREAMING, filter->write_ok);
 	__set_bit(GPCMD_SET_READ_AHEAD, filter->write_ok);
+
+	/* ZBC Commands */
+	__set_bit(ZBC_OUT, filter->write_ok);
+	__set_bit(ZBC_IN, filter->read_ok);
 }
 
 int blk_verify_command(unsigned char *cmd, fmode_t mode)