• Boaz Harrosh's avatar
    [SCSI] libosd: osd_dev_info: Unique Identification of an OSD device · 2cdd6410
    Boaz Harrosh authored
    Define an osd_dev_info structure that Uniquely identifies an OSD
    device lun on the network. The identification is built from unique
    target attributes and is the same for all network/SAN machines.
    osduld_info_lookup() - NEW
        New API that will lookup an osd_dev by its osd_dev_info.
        This is used by pNFS-objects for cross network global device
        identification. And by exofs multy-device support, the device
        info is specified in the on-disk exofs device table.
    osduld_device_info() - NEW
        Given an osd_dev handle returns its associated osd_dev_info.
        The ULD fetches this information at startup and hangs it on
        each OSD device. (This is a fast operation that can be called
        at any condition)
    osduld_device_same() - NEW
        With a given osd_dev at one hand and an osd_dev_info
        at another, we would like to know if they are the same
        Two osd_dev handles can be checked by:
            osduld_device_same(od1, osduld_device_info(od2));
    osd_auto_detect_ver() - REVISED
        Now returns an osd_dev_info structure. Is only called once
        by ULD as before. See added comments for how to use.
    Signed-off-by: default avatarBoaz Harrosh <bharrosh@panasas.com>
    Signed-off-by: default avatarJames Bottomley <James.Bottomley@suse.de>
osd_initiator.h 14.9 KB