Introduce a new function to inform the servo about upcoming leap second.
This is used when the kernel leap is disabled to allow the servo to
handle better the sudden 1 second step in the offset when the leap
second is inserted or deleted.
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
When synchronizing the system clock and the PTP UTC offset is valid and
traceable, set the TAI offset of the clock to have correct CLOCK_TAI
(which is implemented in the kernel as CLOCK_REALTIME + TAI offset).
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
Split management message creation to more fine-grained functions to allow
notification messages to be created.
The new clock_management_fill_response is called from
clock_management_get_response (so the function behaves exactly the same as
before this patch) and from a new clock_notify_event function. The
difference is clock_management_get_response uses the request message to
construct the reply message, while clock_notify_event constructs the reply
message based on the notification id.
Signed-off-by: Jiri Benc <jbenc@redhat.com>
Add expiration time to subscriptions; they need to be renewed before they
expiry. This way, the subscription automatically times out when phc2sys is
killed.
Signed-off-by: Jiri Benc <jbenc@redhat.com>
This puts groundwork for event subscription and notification. The individual
events are added by subsequent patches.
Signed-off-by: Jiri Benc <jbenc@redhat.com>
The task of preparing the message for transmission and sending it appears
at many places. Unify them into a new function.
Signed-off-by: Jiri Benc <jbenc@redhat.com>
Currently, it is assumed that the management TLV data of management COMMAND
messages is always empty. This is not true for the INITIALIZE command and
also for a custom command we'll be introducing.
Move the check to msg_post_recv and let it check only the TLVs defined by
the standard.
Signed-off-by: Jiri Benc <jbenc@redhat.com>
With the new linreg servo the frequency offset and time offset are
controlled separately. The ratio between master's frequency and the
current frequency of the local clock is known and can be used when
calculating delay or peer delay to improve their accuracy.
This greatly improves the stability of the delay when the servo is
correcting a large offset.
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
Setting GRANDMASTER_SETTINGS_NP is allowed only from UDS, but
PORT_DATA_SET can be set from any port. Move the port check to
clock_manage(), so all clock and port SET actions are restricted
to the UDS port.
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
This fixes cumulativeScaledRateOffset reported in TIME_STATUS_NP before
the rate ratio is updated from port.
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
The 'struct interface' for the UDS port is allocated on the stack, and
when this gets passed to port_open, the port instance takes a pointer to
the string in the 'name' field. Currently this is harmless for the UDS
port, but it is not good form. This patch fixes the issue by making the
interface part of the clock instance.
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Reported-by: Miroslav Lichvar <mlichvar@redhat.com>
Negative path delay measurements are expected with E2E, the user doesn't
need to know when that happens.
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
Although it does not need to, the UDS port tries to allocate a filter,
just as any normal port would. Since the given length is zero, the
filter tries to allocate storage of size zero. When running with
uClibc, calloc(1, 0) returns NULL, but glibc is apparently returning
"a unique pointer value that can later be successfully passed to
free()." Both behaviors are allowed (see MALLOC(3)).
This patch works around the issue by letting the UDS port have a
filter of length one.
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
This patch lets the clock release allocated memory when shutting down. The
main benefit is just to exhibit good form and to make valgrind happier.
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Add new options delay_filter and delay_filter_length to select the
filter and its length. They set both the clock delay filter and the port
peer delay filter. The default is now moving median with 10 samples.
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
Similarly to the servo interface, allow multiple filters to be
used for delay filtering. Convert mave to the new interface.
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
Include also nanoseconds from the current time in the srandom() call.
This should significantly decrease the chance of two machines using the
same random sequence.
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
Check the sanity of the synchronized clock by comparing its uncorrected
frequency with the system monotonic clock. When the measured frequency
offset is larger than the value of the sanity_freq_limit option (20% by
default), a warning message will be printed and the servo will be reset.
Setting the option to zero disables the check.
This is useful to detect when the clock is broken or adjusted by another
program.
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
When a new master is selected, drop the old sync time stamp to prevent
calculating invalid delay in case delay_resp will be received before
first sync from the new master.
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
This patch changes the macro for the server socket address into a global
variable so that a subsequent patch can provide a way to set the variable.
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
When the socket couldn't be opened (e.g. in clknetsim), the file
descriptor is invalid and shouldn't be used for sending.
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
Add 1 to port numbers printed in the log messages to make them
consistent with messages from port.c. The port number 0 is the UDS port,
which is last in the clock->port array.
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
This patch cleans up the BMC logic to allow assuming the GM role when no
other clocks are found in the network. By allowing the "best" to be NULL,
we can let the BMC to naturally pick the local clock as GM. As an added
bonus, this also get rid of the hacky check for a lost master.
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
This patch adds a new servo method to let the algorithm know about the
master clock's reported sync message interval. This information can be
used by the servo to adapt its synchronization parameters.
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Management messages can cause a change in the clock quality. If this
happens, then it is time to run the Best Master Clock algorithm again.
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
This patch also replaces the hard coded logic for the UTC offset and the
time property flags with clock variables. This new clock state will be
used for adjusting the grand master attributes at run time.
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
This patch removes a redundant initialization of the kernel_leap clock
variable. The field is already set in clock_create a few lines earlier.
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
You'd probably expect the body of GET messages to be empty, but
interpretation #29 in
http://standards.ieee.org/findstds/interps/1588-2008.html implies
otherwise. With this change, ptp4l will respond to GETs containing
either an empty dataField or a dataField whose length matches the
managementId. If present, the contents of the dataField are ignored.
Signed-off-by: Geoff Salmon <gsalmon@se-instruments.com>
When a new master is selected, drop the old path delay and don't
calculate the offset until the delay is measured again with the new
master.
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
Reset the STA_UNSYNC flag and maxerror value with every frequency update
to let the kernel synchronize the RTC to the system clock (11 minute mode).
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
The clockid parameter to the function to get the system clock's maximum
adjustment is redundant, so let us just remove it.
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
When using software time stamping and a free running clock, the
statistics appear to be off by the TAI offset. This patch fixes the
issue by setting the internal UTC timescale flag in such cases.
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Due to a bug in older kernels, frequency reading may silently fail and
return 0. Set the frequency to the read value to make sure the servo
has the actual frequency of the clock.
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
Miroslav Lichvar
Jiri Benc
Richard Cochran
Geoff Salmon