On 02/23/2013 05:38 AM, Aastha Mehta wrote: > Hello, > > I am trying to understand how a device is discovered by the initiator > and registered at the client side. Specifically I would like to know > how does the target show up as a /dev/sd* to the client.
When the iscsi layer is logged into the target, we will ask the scsi layer to do a scan for devices. We do this by doing echo - - - > /sys/class/scsi_host/hostX/scan from iscsid (see open-iscsi/usr code for that). The scsi layer then sends reports luns and inquirys and creates scsi_device and scsi_target objects. > > I see in the kernel code a iscsi_endpoint structure which holds a > device and a connection for the device. But I am not sure if and how > this endpoint is used. The device structs embedded in the iscsi conn, endpoint and session are not the type of devices you are asking about. They are linux kernel driver model device structs and are only used for sysfs/refcount stuff. > > Or else, where is the device structure maintained at the initiator for > a particular iscsi target? > > If there is any documentation available on this, clearly I have missed > it. Please direct me to the same. > > Thanks in advance. > > Regards, > Aastha. > -- You received this message because you are subscribed to the Google Groups "open-iscsi" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/open-iscsi?hl=en. For more options, visit https://groups.google.com/groups/opt_out.
