Hi, I'm going over the code in bs_rdwr_request: the data is read/written from/to the device using pread64/pwrite64. I understand that it treats the device as a file and just reads/writes from/to it with some offset. What I don't understand is if the data is copied between user & kernel space. Eventually, it will go from tgt (user) to scsi-ml (kernel) somehow. Another question is - where are scsi_get_in_buffer/scsi_get_out_buffer defined? I couldn't find it anywhere and googling it didn't help. Thanks, Erez |