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Ending SCSI request in block level driver

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Operating Systems Linux Ubuntu Ending SCSI request in block level driver
# 1  
Old 06-11-2011
Ending SCSI request in block level driver
hi,

We are currently working on block level driver in linux ubuntu .we are having a storage controller and we are trying to capture and filling the scsi requests to a particular LUN.

We are trying to mask a request for that LUN. We were able to get LUN id of hard drive. Our objective is to restrict all the request for that particular LUN at the block level.

We tried to end the request using blk_end_request/blk_end_request_all when the request is to the LUN id that we are trying to mask ,
but while trying this our server got hanged.

SO Please help us , how to end the request for particular LUN without ending other request for other LUNs.Because all the scsi requests are going thorugh do_cciss_request only.

Thanks in Advance
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LEARN ABOUT XFREE86

tran_bus_reset

tran_bus_reset(9e)						Driver Entry Points						tran_bus_reset(9e)

NAME

       tran_bus_reset - reset a SCSI bus

SYNOPSIS

       #include <sys/scsi/scsi.h> int prefix

       tran_bus_reset(dev_info_t *hba_dip, int level);

INTERFACE LEVEL

       Solaris DDI

PARAMETERS

       hba_dip	       The  dev_info_t pointer associated with the SCSI HBA.

       level	       The level of reset required.

DESCRIPTION

       The   tran_bus_reset()  vector  in  the	scsi_hba_tran(9S) structure should be initialized during the HBA driver's attach(9E). It is an HBA
       entry point to be called when a user initiates a bus reset through device control interfaces.

       tran_bus_reset() must reset the SCSI bus without resetting targets.

       level will be one of the following:

       RESET_BUS       Reset the SCSI bus only, not the targets.

       Implementation is hardware specific. If it is not possible to reset the SCSI bus without changing the state and operating mode of the  tar-
       gets, the HBA driver should not initialize this vector or return failure.

RETURN VALUES

       tran_bus_reset() should return:

       1	on success.

       0	on failure.

ATTRIBUTES

       See attributes(5) for a description of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       |Stability Level 	     |Evolving			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       attributes(5), tran_quiesce(9E), scsi_hba_tran(9S)

SunOS 5.10							    17 Mar 1999 						tran_bus_reset(9e)