staging: usbip: vhci: handle EAGAIN from SO_RCVTIMEO

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If there is a receive timeout without any active
requests, we can tell the connection was idle and
ignore the timeout.

If there are active requests for which we expect
to receive a reply we close the connection.

This makes it possible to set an upper bound on
the time a usbip device may be unresponsive.

This is a workaround for the lack of heart-beat
messages in the USBIP protocol.

Extending the protocol would break compatibility
with all previous stub versions, so this seems like
the lesser evil.

Signed-off-by: Max Vozeler <max@vozeler.com>
Tested-by: Mark Wehby <MWehby@luxotticaRetail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

...

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Max Vozeler 2011-01-12 15:02:04 +02:00 • committed by Greg Kroah-Hartman

parent 7e249c8b07

commit bd65f6233f

1 changed files with 20 additions and 1 deletions

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drivers/staging/usbip/vhci_rx.c

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