SCSI_EH_PREP_CMND

Section: SCSI mid layer (9)
Updated: February 2011
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NAME

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

SYNOPSIS

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

ARGUMENTS

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)

DESCRIPTION

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.

AUTHORS

James Bottomley <James.Bottomley@hansenpartnership.com>

: Author.

Rob Landley <rob@landley.net>