ZBC drives are close to disk devices, so sd.c is well suited as a testbed for ZBC devices. This patch introduces a module option 'attach_zbc' to sd which will make the sd driver accept ZBC devices as normal disk drives.
Signed-off-by: Hannes Reinecke <[email protected]> --- drivers/scsi/sd.c | 25 +++++++++++++++++++------ 1 file changed, 19 insertions(+), 6 deletions(-) diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index 377a520..f957a85 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -91,6 +91,13 @@ MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISK15_MAJOR); MODULE_ALIAS_SCSI_DEVICE(TYPE_DISK); MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD); MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC); +MODULE_ALIAS_SCSI_DEVICE(TYPE_ZBC); + +static bool sd_attach_zbc; + +module_param_named(attach_zbc, sd_attach_zbc, bool, S_IRUGO|S_IWUSR); +MODULE_PARM_DESC(attach_zbc, + "Attach to ZBC devices (default=0)"); #if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT) #define SD_MINORS 16 @@ -161,7 +168,7 @@ cache_type_store(struct device *dev, struct device_attribute *attr, static const char temp[] = "temporary "; int len; - if (sdp->type != TYPE_DISK) + if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) /* no cache control on RBC devices; theoretically they * can do it, but there's probably so many exceptions * it's not worth the risk */ @@ -259,7 +266,7 @@ allow_restart_store(struct device *dev, struct device_attribute *attr, if (!capable(CAP_SYS_ADMIN)) return -EACCES; - if (sdp->type != TYPE_DISK) + if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) return -EINVAL; sdp->allow_restart = simple_strtoul(buf, NULL, 10); @@ -389,7 +396,7 @@ provisioning_mode_store(struct device *dev, struct device_attribute *attr, if (!capable(CAP_SYS_ADMIN)) return -EACCES; - if (sdp->type != TYPE_DISK) + if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) return -EINVAL; if (!strncmp(buf, lbp_mode[SD_LBP_UNMAP], 20)) @@ -456,7 +463,7 @@ max_write_same_blocks_store(struct device *dev, struct device_attribute *attr, if (!capable(CAP_SYS_ADMIN)) return -EACCES; - if (sdp->type != TYPE_DISK) + if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) return -EINVAL; err = kstrtoul(buf, 10, &max); @@ -2537,7 +2544,7 @@ static void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer) struct scsi_mode_data data; struct scsi_sense_hdr sshdr; - if (sdp->type != TYPE_DISK) + if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC) return; if (sdkp->protection_type == 0) @@ -2957,7 +2964,13 @@ static int sd_probe(struct device *dev) int error; error = -ENODEV; - if (sdp->type != TYPE_DISK && sdp->type != TYPE_MOD && sdp->type != TYPE_RBC) + if (sdp->type != TYPE_DISK && + sdp->type != TYPE_MOD && + sdp->type != TYPE_RBC && + sdp->type != TYPE_ZBC) + goto out; + + if (sdp->type == TYPE_ZBC && !sd_attach_zbc) goto out; SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO, sdp, -- 1.7.12.4 -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
