tree b2bf9ad228f18c643342ad376136d2f6b4be4137
parent 91525300baf162e83e923b09ca286f9205e21522
author Christof Schmitt <christof.schmitt@de.ibm.com> 1200042583 +0100
committer Jens Axboe <jens.axboe@oracle.com> 1201511086 +0100

blktrace: Add blktrace ioctls to SCSI generic devices

Since the SCSI layer uses the request queues from the block layer, blktrace can
also be used to trace the requests to all SCSI devices (like SCSI tape drives),
not only disks. The only missing part is the ioctl interface to start and stop
tracing.

This patch adds the SETUP, START, STOP and TEARDOWN ioctls from blktrace to the
sg device files. With this change, blktrace can be used for SCSI devices like
for disks, e.g.: blktrace -d /dev/sg1 -o - | blkparse -i -

Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>