Hi, I'm working with a dm device which needs a way to communicate with a userspace application as follows: 1. The application gives a list of sectors which should be updated in an async way by the dm device. 2. The application requests to the dm device a list of sectors which meet with some condition. What is a good way to implement this? I'm rather new to the kernel as well as device mapper, and possible ways that I can imagine are: 1. adding ioctl (is it possible/ok to have target specific ioctl command?) 2. creating a sysfs/proc entry Or do you think it's a bad idea that the userspace application and the dm device communicate in that way? Thanks, Hyogi -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
