• Martin K. Petersen's avatar
    block: Replace bi_integrity with bi_special · 180b2f95
    Martin K. Petersen authored
    For commands like REQ_COPY we need a way to pass extra information along
    with each bio. Like integrity metadata this information must be
    available at the bottom of the stack so bi_private does not suffice.
    
    Rename the existing bi_integrity field to bi_special and make it a union
    so we can have different bio extensions for each class of command.
    
    We previously used bi_integrity != NULL as a way to identify whether a
    bio had integrity metadata or not. Introduce a REQ_INTEGRITY to be the
    indicator now that bi_special can contain different things.
    
    In addition, bio_integrity(bio) will now return a pointer to the
    integrity payload (when applicable).
    Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
    Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
    Reviewed-by: default avatarSagi Grimberg <sagig@mellanox.com>
    Signed-off-by: default avatarJens Axboe <axboe@fb.com>
    180b2f95
data-integrity.txt 13.2 KB