An oversize incoming packet might overwrite the reference counter in a
message. Prevent this by providing a buffer large enough for the largest
possible packet.
This will also be needed to support TLV suffixes.
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
If an announce timeout occurs on a port, and no other port is slaved, then
the clock must become a grand master by default.
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
When computing a port's best foreign master, we make use of a message
reference that possibly might have been dropped by calling msg_put in
the fc_prune subroutine. This commit fixes the issue by copying the
needed data from the message before pruning.
[ Actually, since msg_put only places the message into a list without
altering its contents, there was no ill effect. But using a message
after having released it is just plain wrong. ]
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Under Linux, when the link goes down our multicast socket becomes stale.
We always poll(2) for events, but the link down does not trigger any event
to let us know that something is wrong. Once the port enters master mode
and starts announcing itself, the socket throws an error. This in turn
causes a fault, and we reopen the socket when clearing the fault.
However, in the case of slave only mode, if the port is listening then
it will never send, discover the link error, or repair the socket. This
patch fixes the issue by simply reopening the socket after an announce
timeout.
[ Another way would be to use a netlink socket, but that would add too
much complexity as it poorly matches our port/interface model. ]
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
The message code is horribly broken in three ways.
1. Clearing the message also sets the reference count to zero.
2. The recycling code in msg_put does not test the reference count.
3. The allocation code does not remove the message from the pool,
although this code was never reached because of point 2.
This patch fixes the issues and also adds some debugging code to trace
the message pool statistics.
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
When diagnosing a log file, it can be useful to know the relative time
between the log entries. In contrast, the PID is mostly useless, since
the program does not ever fork.
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
This structure is not very useful for message parsing. This commit fixes
the declaration in preparation for TLV handling.
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
This patch is in preparation for handling the suffix TLV data. We will
need to use the structure size more than once.
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
If the new ethtool operation is supported, then use it to verify that the PHC
selected by the user is correct. If the user doesn't specify a PHC and ethtool
is supported then automatically select the PHC device.
If the user specifies a PHC device, and the ethtool operation is suppported,
automatically confirm that the PHC device requested is correct. This check is
performed for all ports, in order to verify that a boundary clock setup is
valid.
The check for PHC device validity is not done in the transport because the
only thing necessary for performing the check is the port name. Handled this
in the port_open code instead.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
this patch makes sure every function is checked for a negative return value
and ensures that a fault is detected when these fail
-v2-
* Fixed only check the ones with return value
-v3-
* Modified the delay_req functions to return 0 on nonfault cases
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
On 32 bit platforms, a PHC driver might allow a larger adjustment than
can fit into the 'long' type used in the clock_adjtime interface. This
patch fixes the issue by using the smaller of the two maxima.
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
The current port code is very defensive. As the code now stands, we throw
a fault whenever we cannot send or receive a packet. Even a downed link
on an interface will cause a port fault.
This commit adds a very simple minded way of clearing the faults. We just
try to enable the port again after waiting a bit.
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
This commit makes each pair of port functions, open/close and
initialize/disable, balance each other in how they allocate or free
resources. This change lays some ground work to allow proper fault
handling and disable/enable logic later on.
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
It was a cute idea to have the raw Ethernet layer use just one socket,
but it ended up not working on some specific PTP time stamping hardware.
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
This change will make it easier to extend the configuration file contents
to include arbitrary new data structures.
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Delio Brignoli
Richard Cochran
Jacob Keller
Eliot Blennerhassett
Christian Riesch