size(D2)

NAME
     size - return size of logical block device

SYNOPSIS
     #include <sys/types.h>
     #include <sys/param.h>
     #include <sys/ddi.h>
     int prefixsize(dev_t dev);

   Arguments
     dev       The logical device number.

DESCRIPTION
     The size entry point returns the number of NBPSCTR-byte units on a
     logical block device (partition).  NBPSCTR, defined in param.h, is the
     number of bytes per logical disk sector.

   Return Values
     On success, the size routine should return the number of NBPSCTR-byte
     units on the logical block device specified by dev; on failure, size
     should return -1.  Failure cases should include devices whose size will
     not fit in an int; these devices should have a size64 entry point as
     well.

USAGE
     This entry point is required in all block device drivers.

     size(D2) is called only when the device is open.

   Synchronization Constraints
     The size routine has user context and can sleep.  However, it should be
     careful not to spend much time sleeping, especially if the routine is
     called when the logical device is not open.

SEE ALSO
     size64(D2)