Man page 9 : scsi_eh_prep_cmnd

scsi_eh_prep_cmnd - Save a scsi command info as part of error recovery

void scsi_eh_prep_cmnd(struct scsi_cmnd *  scmd , struct scsi_eh_save *  ses , unsigned char *  cmnd , int  cmnd_size , unsigned  sense_bytes );

scmd
    SCSI command structure to hijack

ses
    structure to save restore information

cmnd
    CDB to send. Can be NULL if no new cmnd is needed

cmnd_size
    size in bytes of cmnd (must be <= BLK_MAX_CDB)

sense_bytes
    size of sense data to copy. or 0 (if != 0 cmnd is ignored)

This function is used to save a scsi command information before re-execution as part of the error recovery process. If sense_bytes is 0 the command sent must be one that does not transfer any data. If sense_bytes != 0 cmnd is ignored and this functions sets up a REQUEST_SENSE command and cmnd buffers to read sense_bytes into scmd->sense_buffer.

James Bottomley <>
    Author.

Rob Landley <>
    Author.