linux-stable.git/tools/testing, branch v5.15.208

selftests: mptcp: more stable simult_flows tests

2026-04-18T08:33:09+00:00

commit 8c09412e584d9bcc0e71d758ec1008d1c8d1a326 upstream.

By default, the netem qdisc can keep up to 1000 packets under its belly
to deal with the configured rate and delay. The simult flows test-case
simulates very low speed links, to avoid problems due to slow CPUs and
the TCP stack tend to transmit at a slightly higher rate than the
(virtual) link constraints.

All the above causes a relatively large amount of packets being enqueued
in the netem qdiscs - the longer the transfer, the longer the queue -
producing increasingly high TCP RTT samples and consequently increasingly
larger receive buffer size due to DRS.

When the receive buffer size becomes considerably larger than the needed
size, the tests results can flake, i.e. because minimal inaccuracy in the
pacing rate can lead to a single subflow usage towards the end of the
connection for a considerable amount of data.

Address the issue explicitly setting netem limits suitable for the
configured link speeds and unflake all the affected tests.

Fixes: 1a418cb8e888 ("mptcp: simult flow self-tests")
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Abeni 
Reviewed-by: Matthieu Baerts (NGI0) 
Signed-off-by: Matthieu Baerts (NGI0) 
Link: https://patch.msgid.link/20260303-net-mptcp-misc-fixes-7-0-rc2-v1-1-4b5462b6f016@kernel.org
Signed-off-by: Jakub Kicinski 
Signed-off-by: Greg Kroah-Hartman

selftests/mm/charge_reserved_hugetlb: drop mount size for hugetlbfs

2026-03-04T12:20:30+00:00

[ Upstream commit 1aa1dd9cc595917882fb6db67725442956f79607 ]

charge_reserved_hugetlb.sh mounts a hugetlbfs instance at /mnt/huge with a
fixed size of 256M.  On systems with large base hugepages (e.g.  512MB),
this is smaller than a single hugepage, so the hugetlbfs mount ends up
with zero capacity (often visible as size=0 in mount output).

As a result, write_to_hugetlbfs fails with ENOMEM and the test can hang
waiting for progress.

=== Error log ===
  # uname -r
  6.12.0-xxx.el10.aarch64+64k

  #./charge_reserved_hugetlb.sh -cgroup-v2
  # -----------------------------------------
  ...
  # nr hugepages = 10
  # writing cgroup limit: 5368709120
  # writing reseravation limit: 5368709120
  ...
  # write_to_hugetlbfs: Error mapping the file: Cannot allocate memory
  # Waiting for hugetlb memory reservation to reach size 2684354560.
  # 0
  # Waiting for hugetlb memory reservation to reach size 2684354560.
  # 0
  ...

  # mount |grep /mnt/huge
  none on /mnt/huge type hugetlbfs (rw,relatime,seclabel,pagesize=512M,size=0)

  # grep -i huge /proc/meminfo
  ...
  HugePages_Total:      10
  HugePages_Free:       10
  HugePages_Rsvd:        0
  HugePages_Surp:        0
  Hugepagesize:     524288 kB
  Hugetlb:         5242880 kB

Drop the mount args with 'size=256M', so the filesystem capacity is sufficient
regardless of HugeTLB page size.

Link: https://lkml.kernel.org/r/20251221122639.3168038-3-liwang@redhat.com
Fixes: 29750f71a9b4 ("hugetlb_cgroup: add hugetlb_cgroup reservation tests")
Signed-off-by: Li Wang 
Acked-by: David Hildenbrand (Red Hat) 
Acked-by: Waiman Long 
Cc: Mark Brown 
Cc: Shuah Khan 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Sasha Levin

selftests: forwarding: vxlan_bridge_1d: fix test failure with br_netfilter enabled

2026-03-04T12:19:51+00:00

[ Upstream commit 02cb2e6bacbb08ebf6acb61be816efd11e1f4a21 ]

The test generates VXLAN traffic using mausezahn, where the encapsulated
inner IPv4 packet contains a zero IP header checksum. After VXLAN
decapsulation, such packets do not pass sanity checks in br_netfilter
and are dropped, which causes the test to fail.

Fix this by calculating and setting a valid IPv4 header checksum for the
encapsulated packet generated by mausezahn, so that the packet is accepted
by br_netfilter. Fixed by using the payload_template_calc_checksum() /
payload_template_expand_checksum() helpers that are only available
in v6.3 and newer kernels.

Fixes: a0b61f3d8ebf ("selftests: forwarding: vxlan_bridge_1d: Add an ECN decap test")
Signed-off-by: Aleksei Oladko 
Reviewed-by: Ido Schimmel 
Link: https://patch.msgid.link/20260213131907.43351-2-aleksey.oladko@virtuozzo.com
Signed-off-by: Paolo Abeni 
Signed-off-by: Sasha Levin

selftests: mlxsw: tc_restrictions: Fix test failure with new iproute2

2026-03-04T12:19:50+00:00

[ Upstream commit a2646773a005b59fd1dc7ff3ba15df84889ca5d2 ]

As explained in [1], iproute2 started rejecting tc-police burst sizes
that result in an overflow. This can happen when the burst size is high
enough and the rate is low enough.

A couple of test cases specify such configurations, resulting in
iproute2 errors and test failure.

Fix by reducing the burst size so that the test will pass with both new
and old iproute2 versions.

[1] https://lore.kernel.org/netdev/20250916215731.3431465-1-jay.vosburgh@canonical.com/

Fixes: cb12d1763267 ("selftests: mlxsw: tc_restrictions: Test tc-police restrictions")
Signed-off-by: Ido Schimmel 
Signed-off-by: Petr Machata 
Reviewed-by: Simon Horman 
Link: https://patch.msgid.link/88b00c6e85188aa6a065dc240206119b328c46e1.1770643998.git.petrm@nvidia.com
Signed-off-by: Jakub Kicinski 
Signed-off-by: Sasha Levin

selftests: mptcp: pm: ensure unknown flags are ignored

2026-02-19T15:21:45+00:00

commit 29f4801e9c8dfd12bdcb33b61a6ac479c7162bd7 upstream.

This validates the previous commit: the userspace can set unknown flags
-- the 7th bit is currently unused -- without errors, but only the
supported ones are printed in the endpoints dumps.

The 'Fixes' tag here below is the same as the one from the previous
commit: this patch here is not fixing anything wrong in the selftests,
but it validates the previous fix for an issue introduced by this commit
ID.

Fixes: 01cacb00b35c ("mptcp: add netlink-based PM")
Cc: stable@vger.kernel.org
Reviewed-by: Mat Martineau 
Signed-off-by: Matthieu Baerts (NGI0) 
Link: https://patch.msgid.link/20251205-net-mptcp-misc-fixes-6-19-rc1-v1-2-9e4781a6c1b8@kernel.org
Signed-off-by: Jakub Kicinski 
[ Conflicts in pm_netlink.sh, because some refactoring have been done
  later on: commit 0d16ed0c2e74 ("selftests: mptcp: add
  {get,format}_endpoint(s) helpers") and commit c99d57d0007a
  ("selftests: mptcp: use pm_nl endpoint ops") are not in this version.
  The same operation can still be done at the same place, without using
  the new helpers.
  Also, commit 1dc88d241f92 ("selftests: mptcp: pm_nl_ctl: always look
  for errors") is not in this version, and create a conflict in the
  context which is not related to the modification here.
  Conflicts in pm_nl_ctl.c, because commit 69c6ce7b6eca ("selftests:
  mptcp: add implicit endpoint test case") is not in this version, and
  caused a conflict in the context which is not related to the
  modification here. ]
Signed-off-by: Matthieu Baerts (NGI0) 
Signed-off-by: Greg Kroah-Hartman

testptp: Add option to open PHC in readonly mode

2026-02-06T15:41:52+00:00

[ Upstream commit 76868642e42795353106197abf9c607ad80f4c9e ]

PTP Hardware Clocks no longer require WRITE permission to perform
readonly operations, such as listing device capabilities or listening to
EXTTS events once they have been enabled by a process with WRITE
permissions.

Add '-r' option to testptp to open the PHC in readonly mode instead of
the default read-write mode. Skip enabling EXTTS if readonly mode is
requested.

Acked-by: Richard Cochran 
Reviewed-by: Vadim Fedorenko 
Signed-off-by: Wojtek Wasko 
Signed-off-by: David S. Miller 
Signed-off-by: Sasha Levin

selftest/ptp: update ptp selftest to exercise the gettimex options

2026-02-06T15:41:51+00:00

[ Upstream commit 3d07b691ee707c00afaf365440975e81bb96cd9b ]

With the inclusion of commit c259acab839e ("ptp/ioctl: support
MONOTONIC{,_RAW} timestamps for PTP_SYS_OFFSET_EXTENDED") clock_gettime()
now allows retrieval of pre/post timestamps for CLOCK_MONOTONIC and
CLOCK_MONOTONIC_RAW timebases along with the previously supported
CLOCK_REALTIME.

This patch adds a command line option 'y' to the testptp program to
choose one of the allowed timebases [realtime aka system, monotonic,
and monotonic-raw).

Signed-off-by: Mahesh Bandewar 
Cc: Shuah Khan 
Acked-by: Richard Cochran 
Link: https://patch.msgid.link/20241003101506.769418-1-maheshb@google.com
Signed-off-by: Jakub Kicinski 
Stable-dep-of: 76868642e427 ("testptp: Add option to open PHC in readonly mode")
Signed-off-by: Sasha Levin

ptp: add testptp mask test

2026-02-06T15:41:51+00:00

[ Upstream commit 26285e689c6cd2cf3849568c83b2ebe53f467143 ]

Add option to test timestamp event queue mask manipulation in testptp.

Option -F allows the user to specify a single channel that will be
applied on the mask filter via IOCTL.

The test program will maintain the file open until user input is
received.

This allows checking the effect of the IOCTL in debugfs.

eg:

Console 1:
```
Channel 12 exclusively enabled. Check on debugfs.
Press any key to continue
```

Console 2:
```
0x00000000 0x00000001 0x00000000 0x00000000 0x00000000 0x00000000
0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000
0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000
0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000
0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000
0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000
0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000
0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000
0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000
0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000
0x00000000 0x00000000 0x00000000 0x00000000
```

Signed-off-by: Xabier Marquiegui 
Suggested-by: Richard Cochran 
Suggested-by: Vinicius Costa Gomes 
Signed-off-by: David S. Miller 
Stable-dep-of: 76868642e427 ("testptp: Add option to open PHC in readonly mode")
Signed-off-by: Sasha Levin

selftests/ptp: Add -X option for testing PTP_SYS_OFFSET_PRECISE

2026-02-06T15:41:51+00:00

[ Upstream commit 3cf119ad5dc2b5c11385106d6d0ba86fbb47324c ]

The -X option was chosen because X looks like a cross, and the underlying
callback is 'get cross timestamp'.

Signed-off-by: Alex Maftei 
Signed-off-by: David S. Miller 
Stable-dep-of: 76868642e427 ("testptp: Add option to open PHC in readonly mode")
Signed-off-by: Sasha Levin

selftests/ptp: Add -x option for testing PTP_SYS_OFFSET_EXTENDED

2026-02-06T15:41:51+00:00

[ Upstream commit c8ba75c4eb846888f8f2730690b99cb5bf7b337c ]

The -x option (where 'x' stands for eXtended) takes an argument which
represents the number of samples to request from the PTP device.
The help message will display the maximum number of samples allowed.
Providing an invalid argument will also display the maximum number of
samples allowed.

Signed-off-by: Alex Maftei 
Signed-off-by: David S. Miller 
Stable-dep-of: 76868642e427 ("testptp: Add option to open PHC in readonly mode")
Signed-off-by: Sasha Levin