u can find such layered idea every where. scsi sd/st/sr, middle layer, lower layer; netfilter device mapper. ... ming On Tue, 2006-04-11 at 19:04 +0530, Pankaj Chauhan wrote: > > i am not talking about any specific type of device driver. > > What i want is a generic framework which can help me implementing any > driver as a stack of modules (each module implementing a subset of > complete functionality of driver), and ablility to insert and remove > modules without doing any code change in rest of modules. > > > pankaj > > > > On 4/11/06, Ming Zhang <mingz@xxxxxxxxxxx> wrote: > if u are talking about block device. then go and check device > mapper. > > ming > > On Tue, 2006-04-11 at 14:54 +0530, Pankaj Chauhan wrote: > > > > hi all, > > > > Is there any framework available in linux kernel > > (2.6.x) to stack the modules (or device drivers to be > > specific). what i want is NETFILTER (which is > > available for network stack) kind of frame work for > > device drivers. > > > > Lets say i have a driver d1 for device D, d1 > > implements very basic funtionality like configuration, > > read and write to device D. now i want some more > > complex funtions such as compression or encryption of > > data that is written to D, so i want that i write a > > driver d2 which sits on top of d1 and implement new > > funtionality. so we have a picture like > > > > d2 (compression / encryption) > > | > > d1 (basic functions) > > | > > D (device) > > > > I understand that it is possible to implement this > > stacking by code changes in d1 and d2, but tomorrow if > > i want to insert another funtionality implemented as > > d3 which should go between d2 and d1, i do'nt want to > > do any code changes to d1 and d2, i want that there > > should be a framework which allows me to implement > > this stacking without any code change in my driver. > > > > Thanks in advance. > > > > Pankaj Chauhan > > > > > > > > > > > -- > Vision without an action is merely a dream, action without vision is > wastage of time, vision and action together can change the world.. -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
