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Re: Almost working pci-arbiter with rumpdisk

From: Samuel Thibault
Subject: Re: Almost working pci-arbiter with rumpdisk
Date: Sun, 21 Feb 2021 11:21:18 +0100
User-agent: NeoMutt/20170609 (1.8.3)


Damien Zammit, le dim. 21 févr. 2021 17:00:32 +1100, a ecrit:
> > ? once libpciaccess gets a port on pci-arbiter's root, it can use
> > file_name_lookup_under to open directories and files in it. libnetfs
> > will want to check permissions, but it could be made to accept anything
> > when auth/proc are not available yet.
> Not sure why, but my rump code calling into libpciaccess using hurd method
> hangs on trying to openport the root pcifs: 
> Here is part of enum_devices in my libpciaccess:
>             mach_print("openport...");
>             fd = openport (root, O_DIRECTORY | O_RDONLY | O_EXEC);

Mmm. I guess that's missing _hurd_init initialization. It would
be tricky to separate out the really basic pieces from proc/auth
initialization, I'd say it will be a lot less tricky to just make
hurd_pci.c use the dir_readdir RPC directly on the root port instead of
going through the readdir layer. dir_readdir is not that complex to use.

Similarly, if pci_device_hurd_read_rom ever gets to be called, use
dir_lookup/io_read instead of open/read.


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