vscsi 2TB patches

[Samuel Kvasnica <bugreports@list.ims.co.at>]

[-- Attachment #1: Type: text/plain, Size: 710 bytes --]

Hello xen developers,

the current xen vscsi driver implementation has a nasty >2TB limitation.
Both the
backend and frontend driver need a patch - included in the attachments.

Basically, for the frontend, just the max_cmd_len needs to be set correctly.
For for the backend, at least the READ_16 and WRITE_16 scsi commands
vere missing.
I also enabled/added some more scsi commands to allow tape drives and
autoloader
work properly.

Could please somebody here take care to add this to mainstream code ?
SuSE people were not interested really and the original author is not
really known, i.e. "Copyright by Fujitsu Limited". I'm really sick of
patching every new kernel over and over...

best ragards,

Sam



[-- Attachment #2: scsiback_2TB_fix.patch --]
[-- Type: text/plain, Size: 4935 bytes --]

diff -r ./scsiback.orig/emulate.c scsiback/emulate.c
30a31,35
> /*
> * Patched to support >2TB drives + allow tape & autoloader operations
> * 2010, Samuel Kvasnica, IMS Nanofabrication AG
> */
> 
384,385c389,390
< 	NO_EMULATE(TEST_UNIT_READY);       /*0x00*/
< 	NO_EMULATE(REZERO_UNIT);           /*0x01*/
---
> 	NO_EMULATE(TEST_UNIT_READY);       /*0x00*/ /* sd,st */
> 	NO_EMULATE(REZERO_UNIT);           /*0x01*/ /* st */
388c393
< 	NO_EMULATE(READ_BLOCK_LIMITS);     /*0x05*/
---
> 	NO_EMULATE(READ_BLOCK_LIMITS);     /*0x05*/ /* st */
390,393c395,398
< 	/*NO_EMULATE(INITIALIZE_ELEMENT_STATUS); *//*0x07*/
< 	NO_EMULATE(READ_6);                /*0x08*/
< 	NO_EMULATE(WRITE_6);               /*0x0a*/
< 	/*NO_EMULATE(SEEK_6);                *//*0x0b*/
---
> 	NO_EMULATE(INITIALIZE_ELEMENT_STATUS); /*0x07*/ /* ch */
> 	NO_EMULATE(READ_6);                /*0x08*/ /* sd,st */
> 	NO_EMULATE(WRITE_6);               /*0x0a*/ /* sd,st */
> 	NO_EMULATE(SEEK_6);                /*0x0b*/
395,396c400,401
< 	NO_EMULATE(WRITE_FILEMARKS);       /*0x10*/
< 	NO_EMULATE(SPACE);                 /*0x11*/
---
> 	NO_EMULATE(WRITE_FILEMARKS);       /*0x10*/ /* st */
> 	NO_EMULATE(SPACE);                 /*0x11*/ /* st */
399c404
< 	/*NO_EMULATE(MODE_SELECT);           *//*0x15*/
---
> 	NO_EMULATE(MODE_SELECT);           /*0x15*/ /* st */
403,406c408,411
< 	NO_EMULATE(ERASE);                 /*0x19*/
< 	NO_EMULATE(MODE_SENSE);            /*0x1a*/
< 	/*NO_EMULATE(START_STOP);            *//*0x1b*/
< 	/*NO_EMULATE(RECEIVE_DIAGNOSTIC);    *//*0x1c*/
---
> 	NO_EMULATE(ERASE);                 /*0x19*/ /* st */
> 	NO_EMULATE(MODE_SENSE);            /*0x1a*/ /* st */
> 	NO_EMULATE(START_STOP);            /*0x1b*/ /* sd,st */
> 	NO_EMULATE(RECEIVE_DIAGNOSTIC);    /*0x1c*/
408c413
< 	/*NO_EMULATE(ALLOW_MEDIUM_REMOVAL);  *//*0x1e*/
---
> 	NO_EMULATE(ALLOW_MEDIUM_REMOVAL);  /*0x1e*/
411,415c416,420
< 	NO_EMULATE(READ_CAPACITY);         /*0x25*/
< 	NO_EMULATE(READ_10);               /*0x28*/
< 	NO_EMULATE(WRITE_10);              /*0x2a*/
< 	/*NO_EMULATE(SEEK_10);               *//*0x2b*/
< 	/*NO_EMULATE(POSITION_TO_ELEMENT);   *//*0x2b*/
---
> 	NO_EMULATE(READ_CAPACITY);         /*0x25*/ /* sd */
> 	NO_EMULATE(READ_10);               /*0x28*/ /* sd */
> 	NO_EMULATE(WRITE_10);              /*0x2a*/ /* sd */
> 	NO_EMULATE(SEEK_10);               /*0x2b*/ /* st */
> 	NO_EMULATE(POSITION_TO_ELEMENT);   /*0x2b*/ /* ch */
421,427c426,432
< 	/*NO_EMULATE(SET_LIMITS);            *//*0x33*/
< 	/*NO_EMULATE(PRE_FETCH);             *//*0x34*/
< 	/*NO_EMULATE(READ_POSITION);         *//*0x34*/
< 	/*NO_EMULATE(SYNCHRONIZE_CACHE);     *//*0x35*/
< 	/*NO_EMULATE(LOCK_UNLOCK_CACHE);     *//*0x36*/
< 	/*NO_EMULATE(READ_DEFECT_DATA);      *//*0x37*/
< 	/*NO_EMULATE(MEDIUM_SCAN);           *//*0x38*/
---
> 	NO_EMULATE(SET_LIMITS);            /*0x33*/
> 	NO_EMULATE(PRE_FETCH);             /*0x34*/ /* st! */
> 	NO_EMULATE(READ_POSITION);          /*0x34*/ /* st */
> 	NO_EMULATE(SYNCHRONIZE_CACHE);      /*0x35*/ /* sd */
> 	NO_EMULATE(LOCK_UNLOCK_CACHE);     /*0x36*/
> 	NO_EMULATE(READ_DEFECT_DATA);      /*0x37*/
> 	NO_EMULATE(MEDIUM_SCAN);           /*0x38*/
430,431c435,436
< 	/*NO_EMULATE(WRITE_BUFFER);          *//*0x3b*/
< 	/*NO_EMULATE(READ_BUFFER);           *//*0x3c*/
---
> 	NO_EMULATE(WRITE_BUFFER);          /*0x3b*/
> 	NO_EMULATE(READ_BUFFER);           /*0x3c*/ /* osst */
437,439c442,444
< 	/*NO_EMULATE(READ_TOC);              *//*0x43*/
< 	/*NO_EMULATE(LOG_SELECT);            *//*0x4c*/
< 	/*NO_EMULATE(LOG_SENSE);             *//*0x4d*/
---
> 	NO_EMULATE(READ_TOC);              /*0x43*/ /* sr */
> 	NO_EMULATE(LOG_SELECT);            /*0x4c*/
> 	NO_EMULATE(LOG_SENSE);             /*0x4d*/ /* st! */
443c448
< 	/*NO_EMULATE(MODE_SENSE_10);         *//*0x5a*/
---
> 	NO_EMULATE(MODE_SENSE_10);         /*0x5a*/ /* scsi_lib */
447,448c452,455
< 	/*NO_EMULATE(MOVE_MEDIUM);           *//*0xa5*/
< 	/*NO_EMULATE(EXCHANGE_MEDIUM);       *//*0xa6*/
---
> 	NO_EMULATE(MAINTENANCE_IN);           /*0xa3*/ /* IFT alua */
> 	NO_EMULATE(MAINTENANCE_OUT);       /*0xa4*/ /* IFT alua */
> 	NO_EMULATE(MOVE_MEDIUM);           /*0xa5*/ /* ch */
> 	NO_EMULATE(EXCHANGE_MEDIUM);       /*0xa6*/ /* ch */
455,456c462,463
< 	/*NO_EMULATE(READ_ELEMENT_STATUS);   *//*0xb8*/
< 	/*NO_EMULATE(SEND_VOLUME_TAG);       *//*0xb6*/
---
> 	NO_EMULATE(READ_ELEMENT_STATUS);   /*0xb8*/ /* ch */
> 	NO_EMULATE(SEND_VOLUME_TAG);       /*0xb6*/ /* ch */
458,461c465,468
< 	/*NO_EMULATE(READ_16);               *//*0x88*/
< 	/*NO_EMULATE(WRITE_16);              *//*0x8a*/
< 	/*NO_EMULATE(VERIFY_16);	      *//*0x8f*/
< 	/*NO_EMULATE(SERVICE_ACTION_IN);     *//*0x9e*/
---
> 	NO_EMULATE(READ_16);               /*0x88*/ /* sd >2TB */
> 	NO_EMULATE(WRITE_16);              /*0x8a*/ /* sd >2TB */
> 	NO_EMULATE(VERIFY_16);	           /*0x8f*/
> 	NO_EMULATE(SERVICE_ACTION_IN);     /*0x9e*/ /* sd >2TB */
462a470
> /* st: QFA_REQUEST_BLOCK, QFA_SEEK_BLOCK */

[-- Attachment #3: scsifront_2TB_fix.patch --]
[-- Type: text/plain, Size: 238 bytes --]

diff -r ./scsifront.orig/xenbus.c ./scsifront/xenbus.c
30c30,34
<  
---
> 
> /*
> * Patched to support >2TB drives
> * 2010, Samuel Kvasnica, IMS Nanofabrication AG
> */
125d128
< 
222a226
> 	host->max_cmd_len = VSCSIIF_MAX_COMMAND_SIZE;

[-- Attachment #4: Type: text/plain, Size: 138 bytes --]

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