> -----Original Message----- > From: KY Srinivasan > Sent: Thursday, November 03, 2011 6:52 PM > To: KY Srinivasan; linux-scsi@xxxxxxxxxxxxxxx; > james.bottomley@xxxxxxxxxxxxxxxxxxxxx; hch@xxxxxxxxxxxxx > Subject: RE: scsi scan > > > > -----Original Message----- > > From: K. Y. Srinivasan [mailto:kys@xxxxxxxxxxxxx] > > Sent: Thursday, November 03, 2011 4:29 PM > > To: linux-scsi@xxxxxxxxxxxxxxx; james.bottomley@xxxxxxxxxxxxxxxxxxxxx; > > hch@xxxxxxxxxxxxx; KY Srinivasan > > Subject: scsi scan > > > > James, > > > > On the Windows host they allow hot add/remove of block devices attached to > > the scsi controller(s) assigned to the guest. > > So, when a hot add/remove event occurs, the host sends a message to the > guest > > that something has changed on the hba and > > the guest is responsible for figuring out what has changed: a) Setup state to > > manage new devices that may have been added > > and b) get rid of devices that may have been removed. As I look at > implementing > > this functionality for Linux guests, > > I would need to be able to do a scan on the hba under question and deal only > > with whatever has changed. > > Is this something that the scsi core supports or would I need to roll out a version > > of scan that would ignore > > devices already scanned (except for the remove case) and properly add new > > devices that may be found. > > Any guidance here would be greatly appreciated. > > I see that the re-scan is correctly done through sysfs by writing > the string "- - -" to the scan file under /sys/class/scsi_host/*/scan. I wish the function scsi_scan_host_selected() were an exported function. This would address the problem I have here. Is there a reason for not exporting this function. Regards, K. Y -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
