• Konrad Rzeszutek Wilk's avatar
    xen/blk[front|back]: Enhance discard support with secure erasing support. · 5ea42986
    Konrad Rzeszutek Wilk authored
    Part of the blkdev_issue_discard(xx) operation is that it can also
    issue a secure discard operation that will permanantly remove the
    sectors in question. We advertise that we can support that via the
    'discard-secure' attribute and on the request, if the 'secure' bit
    is set, we will attempt to pass in REQ_DISCARD | REQ_SECURE.
    
    CC: Li Dongyang <lidongyang@novell.com>
    [v1: Used 'flag' instead of 'secure:1' bit]
    [v2: Use 'reserved' uint8_t instead of adding a new value]
    [v3: Check for nseg when mapping instead of operation]
    Signed-off-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
    5ea42986
blkback.c 24.6 KB