• Douglas Gilbert's avatar
    [PATCH] Report Luns for scsi devices 2.5.10 · 6da71acc
    Douglas Gilbert authored
    Here's a patch for SCSI REPORT LUN scanning, including Douglas Gilbert's
    recent changes to support a short INQUIRY followed by a longer INQUIRY.
    
    Please apply, or let me know if you think it needs any modifications.
    
    It's against linux-2.5.4. It does _not_ change the size of the linux lun.
    
    A description of the 8 byte LUN layout can be found on page 35 of:
    
    ftp://ftp.t10.org/t10/drafts/scc2/scc2r04.pdf
    
    The above is a draft, but matches the layout seen on most disk arrays
    (including EMC, IBM, LSI, and Hitachi). Later drafts (post SCSI-3) have
    this information in the SCSI Architectural Model.
    
    Patch description:
    
    Adds REPORT LUN scanning.
    
    Adds Douglas Gilbert's INQUIRY modification so broken devices that cannot handlean INQUIRY
    of more than 36 bytes can be black-listed, plus saving the INQUIRY
    result in Scsi_Device.
    
    Adds scan_scsis_target function, replacing code in scan_scsis and parts
    of scan_scsis_single. This cleans up the scanning code, and removes a
    really ugly for loop. It would be difficult to add REPORT LUN scanning
    without this change.
    
    Adds missing scsi_release_commandblocks().
    
    No longer sets max_dev_lun out of bounds for BLIST_FORCELUN devices.
    
    Fixes scanning past LUN 7 for SCSI-3 devices (the patch in 2.4.17
    for that fix will not cleanly apply against this code).
    
    -- Patrick Mansfield
    6da71acc
Config.in 12.5 KB