scsi_debug version 1.79 against 2.6.17-rc5

For some time I have been maintaining an advanced version of the scsi_debug driver while the features in the mainline kernel version have remained unchanged. It was suggested that a patch be sent to the list against what is in the mainline (lk 2.6.17-rc5). Due to its size, the attachment is gzipped.

See http://www.torque.net/sg/sdebug26.html for more information about the advanced scsi_debug driver.

This patch could be considered for inclusion in lk 2.6.18

ChangeLog:
- add 'virtual_gb' parameter to simulate large storage (by wrapping in dev_size_mb megabytes of actual ram)
- add 'no_lun_0' parameter to skip lun 0 on each target (but still respond as required to INQUIRY + REPORT LUNS)
- add well know lu support
- add MODE SELECT commands support [pages: 0xa and 0x1c]
- add LOG SENSE command support [pages: 0xd and 0x2f]
- add READ CAPACITY (16) support
- increase number of mode pages supported (to read), mainly transport specific (SAS) mode (sub)pages
- add more VPD pages and extend others, including ATA information VPD page
- START STOP UNIT now maintains a state machine
- READ (16) and WRITE (16) cope with lbas larger than 32 bits (needed for the 'virtual_gb' parameter)
- allow single command transfers up to 32 MB
- more precise error (sense data) messages

Doug Gilbert