Tom Sanders wrote: >Does Linux support layered drivers ? > >I want to write a driver that will take requests from >the applications and will pass them on to underlying > > Lot's of drivers do that. md for RAID looks like a disk to app, and it talks to the hd/sd device itself. They whole USB drivers do it too, using several layers. Ex. app->mouse->input->usbmouse->usb-ohci->usbcore >SD disk driver. For this I need to map open, close, >read, write, ioctl etc entry points to corresponding >functions of the underlying driver. > >Pointer to any info would be appreciated. > That sounds a lot like the sg (scsi generic) driver. Perhaps you should look at it first. /usr/src/linux-2.4/Documentation/scsi-generic.txt or /usr/share/doc/kernel-doc-<version>/scsi-generic.txt and the longer version at <http://www.torque.net/sg/p/sg_v3_ho.html> -Thomas _______________________________________________ Redhat-devel-list mailing list Redhat-devel-list@redhat.com https://listman.redhat.com/mailman/listinfo/redhat-devel-list
