Hello Hurd, This is a new version of the PCI arbiter. Following are some features I've added the project over the last weeks.
- A tiny libnetfs filesystem to expose a tree of devices. - For each virtual device, provide files to read/write its configuration space, regions an expansion rom. - Ability to set access permissions over devices by command line parameter and fsysopts. I tried to run netdde as non-root but gave up because it seemed non-trivial for me and the time for my thesis is running out. Next are some issues I found: - Some network drivers poke IO ports by themselves (See #hurd, 2017-11-23 [1]). - check_kernel() in check_kernel.c[2] is calling get_privileged_ports(). Besides, the pci server lacks some features required to run netdde as non-root: - Provide some way for the client to map device's regions and rom into its space. read() + mmap() could be enough for read-only spaces, but probably making the server act as a pager is the only good solution. (See #hurd, 2017-10-27 [3]). - Provide libpciaccess and pciutils with a way to poke IO ports as non-root. Adding new routines to the PCI interface is an option, or even creating a new interface, since poking IO ports is not necessarily related to PCI. Modules for libpciaccess and pciutils are also attached. ------------------------ [1] http://richtlijn.be/~larstiq/hurd/hurd-2017-11-23 [2] https://anonscm.debian.org/cgit/pkg-hurd/netdde.git/tree/check_kernel.c [3] http://richtlijn.be/~larstiq/hurd/hurd-2017-10-27
