New subject: [Bug 43103] unixfs unable to find file when wine run in a network namespace

28 May 2017


      https://bugs.winehq.org/show_bug.cgi?id=43103
Bug ID: 43103
           Summary: unixfs unable to find file when wine run in a network
                    namespace
           Product: Wine
           Version: 2.3
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: shell32
          Assignee: wine-bugs@winehq.org
          Reporter: lucianposton@gmail.com
      Distribution: ---
If I run wine within a network namespace, wine is unable to find a file,
exiting with an error, wine: cannot find L"unix\home\user\GameDir\game.exe"
To repro the bug, the prefix must be setup such that:
1) "$WINEPREFIX/drive_c/Program Files/GameDir" is a symlink to a directory in
$HOME, outside of the prefix but on the same partition, and
2) the prefix's registry has been modified with the regedit described at
https://github.com/wine-mirror/wine/blob/252051cb1b3f0fc4aade128370fb3e38d90...
. This appears to cause the following behavior to change in wine:
https://github.com/wine-mirror/wine/blob/252051cb1b3f0fc4aade128370fb3e38d90...
If I start wine using
cd "$WINEPREFIX/drive_c/Program Files/GameDir" ; wine game.exe
it behaves fine. wine is able to find game.exe.
However, if I start wine within a namespace,
cd "$WINEPREFIX/drive_c/Program Files/GameDir" ; ip netns exec
MyNetworkNamespace wine game.exe
wine exits with the error:
wine: cannot find L"unix\home\user\GameDir\game.exe"
I expect both to succeed (or both fail, if that's the expect behavior when the
regedit in #2 is performed).
*Ancillary notes on setting up a network namespace*
I setup the network namespace using macvlan, which requires your kernel to have
CONFIG_MACVLAN (if it is compiled as a module, load it). Then you can create a
network namespace and a virtual network interface within the namespace as
follows:
REAL_IFACE=eth0 # set this to your real network interface from ifconfig
NETNS=MyNetworkNamespace # set this to whatever you want to name your namespace
NETNS_IFACE=vlaneth0 # set this to whatever you want to name your new virtual
interface inside the namespace
ip netns add "${NETNS}"
ip link add link "${REAL_IFACE}" name "${NETNS_IFACE}" type macvlan
ip link set "${NETNS_IFACE}" netns "${NETNS}"
ip netns exec "${NETNS}" ip link set "${NETNS_IFACE}" up
# Now give the new interface an ip. I use dhcpcd, but you can use your favorite
dhcp client (or set the ip directly)
ip netns exec "${NETNS}" dhcpcd "${NETNS_IFACE}"
# The interface should now have an ip, which we can verify by running ifconfig
inside the namespace
ip netns exec "${NETNS}" ifconfig
ip netns exec "${NETNS}" wine game.exe
# Note you can use sudo -u to avoid running wine as root in the above command.
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[Bug 43103] New: unixfs unable to find file when wine run in a network namespace