<feed xmlns='http://www.w3.org/2005/Atom'>
<title>linux-stable.git/tools/testing/selftests/drivers, branch v6.1.73</title>
<subtitle>Linux kernel stable tree</subtitle>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/'/>
<entry>
<title>selftests: bonding: do not set port down when adding to bond</title>
<updated>2024-01-10T16:10:24+00:00</updated>
<author>
<name>Hangbin Liu</name>
<email>liuhangbin@gmail.com</email>
</author>
<published>2023-12-23T12:59:22+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=85f6fae44bba43a97449a3d22f6dabde22c2b842'/>
<id>85f6fae44bba43a97449a3d22f6dabde22c2b842</id>
<content type='text'>
[ Upstream commit 61fa2493ca76fd7bb74e13f0205274f4ab0aa696 ]

Similar to commit be809424659c ("selftests: bonding: do not set port down
before adding to bond"). The bond-arp-interval-causes-panic test failed
after commit a4abfa627c38 ("net: rtnetlink: Enslave device before bringing
it up") as the kernel will set the port down _after_ adding to bond if setting
port down specifically.

Fix it by removing the link down operation when adding to bond.

Fixes: 2ffd57327ff1 ("selftests: bonding: cause oops in bond_rr_gen_slave_id")
Signed-off-by: Hangbin Liu &lt;liuhangbin@gmail.com&gt;
Tested-by: Benjamin Poirier &lt;benjamin.poirier@gmail.com&gt;
Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
[ Upstream commit 61fa2493ca76fd7bb74e13f0205274f4ab0aa696 ]

Similar to commit be809424659c ("selftests: bonding: do not set port down
before adding to bond"). The bond-arp-interval-causes-panic test failed
after commit a4abfa627c38 ("net: rtnetlink: Enslave device before bringing
it up") as the kernel will set the port down _after_ adding to bond if setting
port down specifically.

Fix it by removing the link down operation when adding to bond.

Fixes: 2ffd57327ff1 ("selftests: bonding: cause oops in bond_rr_gen_slave_id")
Signed-off-by: Hangbin Liu &lt;liuhangbin@gmail.com&gt;
Tested-by: Benjamin Poirier &lt;benjamin.poirier@gmail.com&gt;
Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>selftests: bonding: do not set port down before adding to bond</title>
<updated>2023-08-30T14:11:02+00:00</updated>
<author>
<name>Hangbin Liu</name>
<email>liuhangbin@gmail.com</email>
</author>
<published>2023-08-17T08:24:59+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=f41781b9d8a4af2b1ede0e1045b62359cf6b66b4'/>
<id>f41781b9d8a4af2b1ede0e1045b62359cf6b66b4</id>
<content type='text'>
[ Upstream commit be809424659c2844a2d7ab653aacca4898538023 ]

Before adding a port to bond, it need to be set down first. In the
lacpdu test the author set the port down specifically. But commit
a4abfa627c38 ("net: rtnetlink: Enslave device before bringing it up")
changed the operation order, the kernel will set the port down _after_
adding to bond. So all the ports will be down at last and the test failed.

In fact, the veth interfaces are already inactive when added. This
means there's no need to set them down again before adding to the bond.
Let's just remove the link down operation.

Fixes: a4abfa627c38 ("net: rtnetlink: Enslave device before bringing it up")
Reported-by: Zhengchao Shao &lt;shaozhengchao@huawei.com&gt;
Closes: https://lore.kernel.org/netdev/a0ef07c7-91b0-94bd-240d-944a330fcabd@huawei.com/
Signed-off-by: Hangbin Liu &lt;liuhangbin@gmail.com&gt;
Link: https://lore.kernel.org/r/20230817082459.1685972-1-liuhangbin@gmail.com
Signed-off-by: Jakub Kicinski &lt;kuba@kernel.org&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
[ Upstream commit be809424659c2844a2d7ab653aacca4898538023 ]

Before adding a port to bond, it need to be set down first. In the
lacpdu test the author set the port down specifically. But commit
a4abfa627c38 ("net: rtnetlink: Enslave device before bringing it up")
changed the operation order, the kernel will set the port down _after_
adding to bond. So all the ports will be down at last and the test failed.

In fact, the veth interfaces are already inactive when added. This
means there's no need to set them down again before adding to the bond.
Let's just remove the link down operation.

Fixes: a4abfa627c38 ("net: rtnetlink: Enslave device before bringing it up")
Reported-by: Zhengchao Shao &lt;shaozhengchao@huawei.com&gt;
Closes: https://lore.kernel.org/netdev/a0ef07c7-91b0-94bd-240d-944a330fcabd@huawei.com/
Signed-off-by: Hangbin Liu &lt;liuhangbin@gmail.com&gt;
Link: https://lore.kernel.org/r/20230817082459.1685972-1-liuhangbin@gmail.com
Signed-off-by: Jakub Kicinski &lt;kuba@kernel.org&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>selftests: mlxsw: Fix test failure on Spectrum-4</title>
<updated>2023-08-30T14:11:01+00:00</updated>
<author>
<name>Ido Schimmel</name>
<email>idosch@nvidia.com</email>
</author>
<published>2023-08-17T13:58:25+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=c663607202f58e0fe17d2db1f9967d641c0195f5'/>
<id>c663607202f58e0fe17d2db1f9967d641c0195f5</id>
<content type='text'>
[ Upstream commit f520489e99a35b0a5257667274fbe9afd2d8c50b ]

Remove assumptions about shared buffer cell size and instead query the
cell size from devlink. Adjust the test to send small packets that fit
inside a single cell.

Tested on Spectrum-{1,2,3,4}.

Fixes: 4735402173e6 ("mlxsw: spectrum: Extend to support Spectrum-4 ASIC")
Signed-off-by: Ido Schimmel &lt;idosch@nvidia.com&gt;
Reviewed-by: Petr Machata &lt;petrm@nvidia.com&gt;
Signed-off-by: Petr Machata &lt;petrm@nvidia.com&gt;
Reviewed-by: Simon Horman &lt;horms@kernel.org&gt;
Link: https://lore.kernel.org/r/f7dfbf3c4d1cb23838d9eb99bab09afaa320c4ca.1692268427.git.petrm@nvidia.com
Signed-off-by: Jakub Kicinski &lt;kuba@kernel.org&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
[ Upstream commit f520489e99a35b0a5257667274fbe9afd2d8c50b ]

Remove assumptions about shared buffer cell size and instead query the
cell size from devlink. Adjust the test to send small packets that fit
inside a single cell.

Tested on Spectrum-{1,2,3,4}.

Fixes: 4735402173e6 ("mlxsw: spectrum: Extend to support Spectrum-4 ASIC")
Signed-off-by: Ido Schimmel &lt;idosch@nvidia.com&gt;
Reviewed-by: Petr Machata &lt;petrm@nvidia.com&gt;
Signed-off-by: Petr Machata &lt;petrm@nvidia.com&gt;
Reviewed-by: Simon Horman &lt;horms@kernel.org&gt;
Link: https://lore.kernel.org/r/f7dfbf3c4d1cb23838d9eb99bab09afaa320c4ca.1692268427.git.petrm@nvidia.com
Signed-off-by: Jakub Kicinski &lt;kuba@kernel.org&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>selftests: drivers: Fix incorrect kernel headers search path</title>
<updated>2023-03-10T08:34:18+00:00</updated>
<author>
<name>Mathieu Desnoyers</name>
<email>mathieu.desnoyers@efficios.com</email>
</author>
<published>2023-01-27T13:57:28+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=88c2276087e30b0983b8d65b44cb13aadc390aac'/>
<id>88c2276087e30b0983b8d65b44cb13aadc390aac</id>
<content type='text'>
commit 07f0148aafe8c95a3a76cd59e9e75b4d78d1d31d upstream.

Use $(KHDR_INCLUDES) as lookup path for kernel headers. This prevents
building against kernel headers from the build environment in scenarios
where kernel headers are installed into a specific output directory
(O=...).

Signed-off-by: Mathieu Desnoyers &lt;mathieu.desnoyers@efficios.com&gt;
Cc: Shuah Khan &lt;shuah@kernel.org&gt;
Cc: linux-kselftest@vger.kernel.org
Cc: Ingo Molnar &lt;mingo@redhat.com&gt;
Cc: &lt;stable@vger.kernel.org&gt;  # 5.18+
Signed-off-by: Shuah Khan &lt;skhan@linuxfoundation.org&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
commit 07f0148aafe8c95a3a76cd59e9e75b4d78d1d31d upstream.

Use $(KHDR_INCLUDES) as lookup path for kernel headers. This prevents
building against kernel headers from the build environment in scenarios
where kernel headers are installed into a specific output directory
(O=...).

Signed-off-by: Mathieu Desnoyers &lt;mathieu.desnoyers@efficios.com&gt;
Cc: Shuah Khan &lt;shuah@kernel.org&gt;
Cc: linux-kselftest@vger.kernel.org
Cc: Ingo Molnar &lt;mingo@redhat.com&gt;
Cc: &lt;stable@vger.kernel.org&gt;  # 5.18+
Signed-off-by: Shuah Khan &lt;skhan@linuxfoundation.org&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>sefltests: netdevsim: wait for devlink instance after netns removal</title>
<updated>2023-03-10T08:33:08+00:00</updated>
<author>
<name>Jiri Pirko</name>
<email>jiri@nvidia.com</email>
</author>
<published>2023-02-20T13:23:36+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=92e832252ec44174217ab1396dfe0fe894e80e05'/>
<id>92e832252ec44174217ab1396dfe0fe894e80e05</id>
<content type='text'>
[ Upstream commit f922c7b1c1c45740d329bf248936fdb78c0cff6e ]

When devlink instance is put into network namespace and that network
namespace gets deleted, devlink instance is moved back into init_ns.
This is done as a part of cleanup_net() routine. Since cleanup_net()
is called asynchronously from workqueue, there is no guarantee that
the devlink instance move is done after "ip netns del" returns.

So fix this race by making sure that the devlink instance is present
before any other operation.

Reported-by: Amir Tzin &lt;amirtz@nvidia.com&gt;
Fixes: b74c37fd35a2 ("selftests: netdevsim: add tests for devlink reload with resources")
Signed-off-by: Jiri Pirko &lt;jiri@nvidia.com&gt;
Reviewed-by: Pavan Chebbi &lt;pavan.chebbi@broadcom.com&gt;
Link: https://lore.kernel.org/r/20230220132336.198597-1-jiri@resnulli.us
Signed-off-by: Paolo Abeni &lt;pabeni@redhat.com&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
[ Upstream commit f922c7b1c1c45740d329bf248936fdb78c0cff6e ]

When devlink instance is put into network namespace and that network
namespace gets deleted, devlink instance is moved back into init_ns.
This is done as a part of cleanup_net() routine. Since cleanup_net()
is called asynchronously from workqueue, there is no guarantee that
the devlink instance move is done after "ip netns del" returns.

So fix this race by making sure that the devlink instance is present
before any other operation.

Reported-by: Amir Tzin &lt;amirtz@nvidia.com&gt;
Fixes: b74c37fd35a2 ("selftests: netdevsim: add tests for devlink reload with resources")
Signed-off-by: Jiri Pirko &lt;jiri@nvidia.com&gt;
Reviewed-by: Pavan Chebbi &lt;pavan.chebbi@broadcom.com&gt;
Link: https://lore.kernel.org/r/20230220132336.198597-1-jiri@resnulli.us
Signed-off-by: Paolo Abeni &lt;pabeni@redhat.com&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>selftests: ocelot: tc_flower_chains: make test_vlan_ingress_modify() more comprehensive</title>
<updated>2023-03-03T10:52:22+00:00</updated>
<author>
<name>Vladimir Oltean</name>
<email>vladimir.oltean@nxp.com</email>
</author>
<published>2023-02-05T19:24:09+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=bcc84443631267ae49418e922584cd50ad04025c'/>
<id>bcc84443631267ae49418e922584cd50ad04025c</id>
<content type='text'>
[ Upstream commit bbb253b206b9c417928a6c827d038e457f3012e9 ]

We have two IS1 filters of the OCELOT_VCAP_KEY_ANY key type (the one with
"action vlan pop" and the one with "action vlan modify") and one of the
OCELOT_VCAP_KEY_IPV4 key type (the one with "action skbedit priority").
But we have no IS1 filter with the OCELOT_VCAP_KEY_ETYPE key type, and
there was an uncaught breakage there.

To increase test coverage, convert one of the OCELOT_VCAP_KEY_ANY
filters to OCELOT_VCAP_KEY_ETYPE, by making the filter also match on the
MAC SA of the traffic sent by mausezahn, $h1_mac.

Signed-off-by: Vladimir Oltean &lt;vladimir.oltean@nxp.com&gt;
Link: https://lore.kernel.org/r/20230205192409.1796428-2-vladimir.oltean@nxp.com
Signed-off-by: Paolo Abeni &lt;pabeni@redhat.com&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
[ Upstream commit bbb253b206b9c417928a6c827d038e457f3012e9 ]

We have two IS1 filters of the OCELOT_VCAP_KEY_ANY key type (the one with
"action vlan pop" and the one with "action vlan modify") and one of the
OCELOT_VCAP_KEY_IPV4 key type (the one with "action skbedit priority").
But we have no IS1 filter with the OCELOT_VCAP_KEY_ETYPE key type, and
there was an uncaught breakage there.

To increase test coverage, convert one of the OCELOT_VCAP_KEY_ANY
filters to OCELOT_VCAP_KEY_ETYPE, by making the filter also match on the
MAC SA of the traffic sent by mausezahn, $h1_mac.

Signed-off-by: Vladimir Oltean &lt;vladimir.oltean@nxp.com&gt;
Link: https://lore.kernel.org/r/20230205192409.1796428-2-vladimir.oltean@nxp.com
Signed-off-by: Paolo Abeni &lt;pabeni@redhat.com&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>selftests: devlink: fix the fd redirect in dummy_reporter_test</title>
<updated>2022-12-31T12:32:55+00:00</updated>
<author>
<name>Jakub Kicinski</name>
<email>kuba@kernel.org</email>
</author>
<published>2022-12-15T02:01:01+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=a02f965d828f8ff6be4ac2a78c323a930219949f'/>
<id>a02f965d828f8ff6be4ac2a78c323a930219949f</id>
<content type='text'>
[ Upstream commit 2fc60e2ff972d3dca836bff0b08cbe503c4ca1ce ]

$number + &gt; bash means redirect FD $number, e.g. commonly
used 2&gt; redirects stderr (fd 2). The test uses 8192&gt; to
write the number 8192 to a file, this results in:

  ./devlink.sh: line 499: 8192: Bad file descriptor

Oddly the test also papers over this issue by checking
for failure (expecting an error rather than success)
so it passes, anyway.

Fixes: ff18176ad806 ("selftests: Add a test of large binary to devlink health test")
Signed-off-by: Jakub Kicinski &lt;kuba@kernel.org&gt;
Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
[ Upstream commit 2fc60e2ff972d3dca836bff0b08cbe503c4ca1ce ]

$number + &gt; bash means redirect FD $number, e.g. commonly
used 2&gt; redirects stderr (fd 2). The test uses 8192&gt; to
write the number 8192 to a file, this results in:

  ./devlink.sh: line 499: 8192: Bad file descriptor

Oddly the test also papers over this issue by checking
for failure (expecting an error rather than success)
so it passes, anyway.

Fixes: ff18176ad806 ("selftests: Add a test of large binary to devlink health test")
Signed-off-by: Jakub Kicinski &lt;kuba@kernel.org&gt;
Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>selftests: net: Fix netdev name mismatch in cleanup</title>
<updated>2022-10-21T04:09:22+00:00</updated>
<author>
<name>Benjamin Poirier</name>
<email>bpoirier@nvidia.com</email>
</author>
<published>2022-10-19T09:10:42+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=b2c0921b926ca69cc399eb356162f35340598112'/>
<id>b2c0921b926ca69cc399eb356162f35340598112</id>
<content type='text'>
lag_lib.sh creates the interfaces dummy1 and dummy2 whereas
dev_addr_lists.sh:destroy() deletes the interfaces dummy0 and dummy1. Fix
the mismatch in names.

Fixes: bbb774d921e2 ("net: Add tests for bonding and team address list management")
Signed-off-by: Benjamin Poirier &lt;bpoirier@nvidia.com&gt;
Reviewed-by: Jonathan Toppins &lt;jtoppins@redhat.com&gt;
Signed-off-by: Jakub Kicinski &lt;kuba@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
lag_lib.sh creates the interfaces dummy1 and dummy2 whereas
dev_addr_lists.sh:destroy() deletes the interfaces dummy0 and dummy1. Fix
the mismatch in names.

Fixes: bbb774d921e2 ("net: Add tests for bonding and team address list management")
Signed-off-by: Benjamin Poirier &lt;bpoirier@nvidia.com&gt;
Reviewed-by: Jonathan Toppins &lt;jtoppins@redhat.com&gt;
Signed-off-by: Jakub Kicinski &lt;kuba@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>selftests: net: Fix cross-tree inclusion of scripts</title>
<updated>2022-10-21T04:09:22+00:00</updated>
<author>
<name>Benjamin Poirier</name>
<email>bpoirier@nvidia.com</email>
</author>
<published>2022-10-19T09:10:41+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=ae108c48b5d2b34bcef3c4fb5076f42c922c426a'/>
<id>ae108c48b5d2b34bcef3c4fb5076f42c922c426a</id>
<content type='text'>
When exporting and running a subset of selftests via kselftest, files from
parts of the source tree which were not exported are not available. A few
tests are trying to source such files. Address the problem by using
symlinks.

The problem can be reproduced by running:
make -C tools/testing/selftests gen_tar TARGETS="drivers/net/bonding"
[... extract archive ...]
./run_kselftest.sh

or:
make kselftest KBUILD_OUTPUT=/tmp/kselftests TARGETS="drivers/net/bonding"

Fixes: bbb774d921e2 ("net: Add tests for bonding and team address list management")
Fixes: eccd0a80dc7f ("selftests: net: dsa: add a stress test for unlocked FDB operations")
Link: https://lore.kernel.org/netdev/40f04ded-0c86-8669-24b1-9a313ca21076@redhat.com/
Reported-by: Jonathan Toppins &lt;jtoppins@redhat.com&gt;
Signed-off-by: Benjamin Poirier &lt;bpoirier@nvidia.com&gt;
Reviewed-by: Jonathan Toppins &lt;jtoppins@redhat.com&gt;
Signed-off-by: Jakub Kicinski &lt;kuba@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
When exporting and running a subset of selftests via kselftest, files from
parts of the source tree which were not exported are not available. A few
tests are trying to source such files. Address the problem by using
symlinks.

The problem can be reproduced by running:
make -C tools/testing/selftests gen_tar TARGETS="drivers/net/bonding"
[... extract archive ...]
./run_kselftest.sh

or:
make kselftest KBUILD_OUTPUT=/tmp/kselftests TARGETS="drivers/net/bonding"

Fixes: bbb774d921e2 ("net: Add tests for bonding and team address list management")
Fixes: eccd0a80dc7f ("selftests: net: dsa: add a stress test for unlocked FDB operations")
Link: https://lore.kernel.org/netdev/40f04ded-0c86-8669-24b1-9a313ca21076@redhat.com/
Reported-by: Jonathan Toppins &lt;jtoppins@redhat.com&gt;
Signed-off-by: Benjamin Poirier &lt;bpoirier@nvidia.com&gt;
Reviewed-by: Jonathan Toppins &lt;jtoppins@redhat.com&gt;
Signed-off-by: Jakub Kicinski &lt;kuba@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>selftests: net: tsn_lib: run phc2sys in automatic mode</title>
<updated>2022-09-26T20:22:01+00:00</updated>
<author>
<name>Vladimir Oltean</name>
<email>vladimir.oltean@nxp.com</email>
</author>
<published>2022-09-23T21:00:15+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=162d52dfee445c21d1fa5c4b1f55765946df4d3e'/>
<id>162d52dfee445c21d1fa5c4b1f55765946df4d3e</id>
<content type='text'>
We can make the phc2sys helper not only synchronize a PHC to
CLOCK_REALTIME, which is what it currently does, but also CLOCK_REALTIME
to a PHC, which is going to be needed in distributed TSN tests.

Instead of making the complexity of the arguments passed to
phc2sys_start() explode, we can let it figure out the sync direction
automatically, based on ptp4l's port states.

Towards that goal, pass just the path to the desired ptp4l instance's
UNIX domain socket, and remove the $if_name argument (from which it
derives the PHC). Also adapt the one caller from the ocelot psfp.sh
test. In the case of psfp.sh, phc2sys_start is able to properly figure
out that CLOCK_REALTIME is the source clock and swp1's PHC is the
destination, because of the way in which ptp4l_start for the
UDS_ADDRESS_SWP1 was called: with slave_only=false, so it will always
win the BMCA and always become the sync master between itself and $h1.

Signed-off-by: Vladimir Oltean &lt;vladimir.oltean@nxp.com&gt;
Reviewed-by: Kurt Kanzenbach &lt;kurt@linutronix.de&gt;
Signed-off-by: Jakub Kicinski &lt;kuba@kernel.org&gt;
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<pre>
We can make the phc2sys helper not only synchronize a PHC to
CLOCK_REALTIME, which is what it currently does, but also CLOCK_REALTIME
to a PHC, which is going to be needed in distributed TSN tests.

Instead of making the complexity of the arguments passed to
phc2sys_start() explode, we can let it figure out the sync direction
automatically, based on ptp4l's port states.

Towards that goal, pass just the path to the desired ptp4l instance's
UNIX domain socket, and remove the $if_name argument (from which it
derives the PHC). Also adapt the one caller from the ocelot psfp.sh
test. In the case of psfp.sh, phc2sys_start is able to properly figure
out that CLOCK_REALTIME is the source clock and swp1's PHC is the
destination, because of the way in which ptp4l_start for the
UDS_ADDRESS_SWP1 was called: with slave_only=false, so it will always
win the BMCA and always become the sync master between itself and $h1.

Signed-off-by: Vladimir Oltean &lt;vladimir.oltean@nxp.com&gt;
Reviewed-by: Kurt Kanzenbach &lt;kurt@linutronix.de&gt;
Signed-off-by: Jakub Kicinski &lt;kuba@kernel.org&gt;
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