#include <sys/types.h> #include <sys/buf.h> #include <sys/ddi.h> #include <sys/sunddi.h>int prefixstrategy(struct buf *bp);
Architecture independent level 1 (DDI/DKI). This entry point is required for block devices.
Pointer to the buf(9S) structure.
The strategy() routine is called indirectly (through cb_ops(9S)) by the kernel to read and write blocks of data on the block device. strategy() may also be called directly or indirectly to support the raw character interface of a block device ( read(9E), write(9E) and ioctl(9E)). The strategy() routine's responsibility is to set up and initiate the transfer.
The strategy() routine should always return 0. On an error condition, it should call bioerror(9f) to set b_flags to the proper error code, and call biodone(9f). Note that a partial transfer is not considered to be an error.