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Add two generic functions to discover active LUNs on a SCSI target.
The functions take a temporary drive descriptor on the target, and a
callback to create a new drive descriptor with a new LUN using the
temporary one as a template.
One of the functions performs REPORT LUNS on the temporary drive to
obtain the list of candidate luns; the other sequentially iterates the
lun numbers up to the given maximum, and is meant as a fallback. Both
functions return the number of successfully created drive descriptors,
or a negative number if an error occured.
This will allow to lift the limitation of most of the SCSI drivers that
support booting off the LUN #0 only.
Signed-off-by: Roman Kagan <rkagan@virtuozzo.com>
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Convert the cdb_is_read() function to a new function scsi_is_read()
which takes a 'struct disk_op_s' as a paramter.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Introduce scsi_fill_cmd() which creates a scsi style "command data
block" from a "struct disk_op_s" disk request.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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The low-level cdb_* functions are now only used from within
cmdblock.c, so don't export them.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Move many C files from the src/ directory to the new src/hw/ directory.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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