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Petr Machata 58cdd1ee65 bridge: mdb: Allow replace of a host-joined group 
[ Upstream commit d9e9f6d7b7 ]

Attempts to replace an MDB group membership of the host itself are
currently bounced:

 # ip link add name br up type bridge vlan_filtering 1
 # bridge mdb replace dev br port br grp 239.0.0.1 vid 2
 # bridge mdb replace dev br port br grp 239.0.0.1 vid 2
 Error: bridge: Group is already joined by host.

A similar operation done on a member port would succeed. Ignore the check
for replacement of host group memberships as well.

The bit of code that this enables is br_multicast_host_join(), which, for
already-joined groups only refreshes the MC group expiration timer, which
is desirable; and a userspace notification, also desirable.

Change a selftest that exercises this code path from expecting a rejection
to expecting a pass. The rest of MDB selftests pass without modification.

Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Link: https://patch.msgid.link/e5c5188b9787ae806609e7ca3aa2a0a501b9b5c4.1738685648.git.petrm@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2025-05-29 11:03:01 +02:00
..
crypto/chacha20-s390 tools/testing/crypto: Use vzalloc instead of vmalloc+memset 2022-07-05 14:46:36 +02:00
cxl cxl/test: Improve init-order fidelity relative to real-world systems 2024-10-25 16:07:04 -05:00
fault-injection failcmd: make failcmd.sh executable 2024-09-01 20:43:32 -07:00
ktest ktest: Fix Test Failures Due to Missing LOG_FILE Directories 2025-04-20 10:15:27 +02:00
kunit kunit: tool: Use qboot on QEMU x86_64 2025-05-29 11:02:49 +02:00
memblock memblock: updates for 6.12-rc1 2024-09-25 11:35:19 -07:00
nvdimm testing: nvdimm: Add MODULE_DESCRIPTION() macros 2024-06-17 18:43:08 -05:00
radix-tree maple_tree: add regression test for spanning store bug 2024-10-17 08:35:10 -07:00
scatterlist tools/testing/scatterlist: add missing defines 2022-01-30 09:56:58 +02:00
selftests bridge: mdb: Allow replace of a host-joined group 2025-05-29 11:03:01 +02:00
shared test suite: use %zu to print size_t 2025-04-25 10:47:43 +02:00
vma tools: fix atomic_set() definition to set the value correctly 2025-01-23 17:23:01 +01:00
vsock vsock/test: Fix occasional failure in SIOCOUTQ tests 2025-05-22 14:29:41 +02:00