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This allows raw1394_bandwidth_modify() and raw1394_channel_modify()
to work on juju without write access to the IRM's character device file.
If either the build-time requirement of firewire-cdev header ABI >= v.2
or the runtime requirement of firewire-core ABI >= v.2 is not satisfied,
the code falls back to transactions to the IRM as before.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
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by Kristian Hogsberg in an e-mail to the linux1394-devel mailing list
on Feb 3, 2009.
Signed-off-by: Dan Dennedy <dan@dennedy.org>
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On 10 Jan, David Moore wrote:
> On Sat, 2009-01-10 at 19:28 +0100, Stefan Richter wrote:
>> @@ -161,14 +160,16 @@ scan_devices(fw_handle_t handle)
...
>> + for (j = 0; j < i; j++)
>> + if (ports[j].card == get_info.card)
>> + continue;
>> +
>
> That continue statement doesn't do what you intended I think.
From: Stefan Richter <stefanr@s5r6.in-berlin.de>
Subject: [PATCH] Work without permission to access local node's /dev/fw*
Fix for juju backend:
libraw1394 required write permission to the character device file of
the local node(s) in order to enumerate cards and for a number of
other operations. This forced users to either run applications like
dvgrab and kino with elevated privileges, or to configure write
permission for all /dev/fw* or at least for local nodes' /dev/fw*.
We now use the first accessible file which was found for each card
for as many tasks as possible, instead of the local node's file.
This allows distributors or admins to implement stricter access
rights (default off, e.g. only on for AV/C and IIDC devices)
without sacrificing functionality of said class of applications.
Access to the local node is now only required by low-level tools
like gscanbus.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Dan Dennedy <dan@dennedy.org>
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Make iso start/stop/start sequences on the same handle, such as those used
by apps such as MythTV behave as expected. I can finally watch video off my
cable box over FireWire using MythTV w/the juju stack now. :)
Initially, seemed a one-liner might be the ticket (setting handle->iso.fd = -1
at the end of fw_iso_shutdown()), but that led to memory corruption and a
locked up system. What ultimately worked was essentially mimicking what the
old stack did to track iso state, and call fw_iso_stop() from
fw_iso_shutdown() as needed.
Nb: Only lightly tested with iso receive via MythTV, but its all fairly
straight-forward, I think.
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: Dan Dennedy <dan@dennedy.org>
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because they do the same.
We only may want a separate fw_bandwidth_modify() in the future when
firewire-core gains a special ioctl() for that.
(Not runtime-tested, but it looks good to me.)
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Dan Dennedy <dan@dennedy.org>
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(juju)
Reported by Adrian Knoth: fw_channel_modify() was unable to allocate
some channels which were actually free.
http://marc.info/?l=linux1394-devel&t=122818128900002
This can be easily fixed by replacing fw_channel_modify() by
ieee1394_channel_modify() because this is highlevel enough to work with
Juju as well. We only may want a separate fw_channel_modify() in the
future when firewire-core gains a special ioctl() for that.
Also fix a documentation typo: raw1394_channel_modify() did not show up
in extracted API documentation due to a cut'n'paste typo in raw1394.h.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Dan Dennedy <dan@dennedy.org>
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The ieee1394 version of raw1394_read_cycle_timer() fell over the cliff
in "First cut at integrating juju". This brings it back and adds a juju
version of it.
Also correct a typo in the inline documentation: s/get/read/
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give them 'fw' names instead of 'juju.'
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Stefan Richter
Dan Dennedy
Jarod Wilson
Dan Dennedy
