On 2022/11/14 5:48, Douglas Gilbert wrote: > On 2022-11-09 10:59, Wenchao Hao wrote: >> The original error injection mechanism was based on scsi_host which >> could not inject fault for a single SCSI device. >> >> This patchset provides the ability to inject errors for a single >> SCSI device. Now we supports inject timeout errors, queuecommand >> errors, and hostbyte, driverbyte, statusbyte, and sense data for >> specific SCSI Command >> >> The first patch add an sysfs interface to add and inquiry single >> device's error injection info; the second patch defined how to remove >> an injection which has been added. The following 3 patches use the >> injection info and generate the related error type. >> >> Wenchao Hao (5): >> scsi:scsi_debug: Add sysfs interface to manager single devices' error inject >> scsi:scsi_debug: Add interface to remove injection which has been added >> scsi:scsi_debug: make command timeout if timeout error is injected >> scsi:scsi_debug: Return failed value for specific command's queuecommand >> scsi:scsi_debug: fail specific scsi command with result and sense data >> >> drivers/scsi/scsi_debug.c | 295 ++++++++++++++++++++++++++++++++++++++ >> 1 file changed, 295 insertions(+) > > Hi, > This patchset seems to assume all scsi_debug devices will be disk (-like) SCSI > devices. That leaves out other device types: tapes, enclosures, WLUNs, etc. > > Have you considered putting these device specific additions under: > /sys/class/scsi_device/<hctl>/device/error_inject/ > instead of > /sys/block/sdb/device/error_inject/ > > ? > > Doug Gilbert > Thanks for your reply. I did not notice other device types, but the error_inject interface is added for scsi_device, so it is available for all types. I would update the path in patch description. Do you have other suggestions?
