>reads/writes to this block device, without any type of >caching, and without going through any layers (e.g >filesystem). I guess what you want to do is "raw I/O" >1) Allocate buffer_head structure >2) Allocate memory for data (read or write). > (This is where I need some pointers as to which >funstions to use, and where to allocate memory from). >3) Minimal initialization of buffer_head structure, so >make_generic_request can carry out the operation. > (Need some pointers here, as there are too many >fields in buffer_head structure). >4) Call generic_make_request(). >5) Upon completion of command, free memory. Not sure if you should work with buffer heads to do raw-IO. If you are talking of 2.4 kernel, kiobuf interfaces should be used. You may want to read Chapter 13 of the ldd book by Rubini for information. Its online in case you didn't know! Hope this helps. Thanks, Vinod >Steps 2 and 3 are where I am a bit lost at this point. > Can someone please point me to examples in the linux >kernel source where this is done, or examples of >applications that might do this. > >Thank you, >Ahmed. > > > > >_______________________________ >Do you Yahoo!? >Declare Yourself - Register online to vote today! >http://vote.yahoo.com > >-- >Kernelnewbies: Help each other learn about the Linux kernel. >Archive: http://mail.nl.linux.org/kernelnewbies/ >FAQ: http://kernelnewbies.org/faq/ >
