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[ Upstream commit d9e9f6d7b7d0c520bb87f19d2cbc57aeeb2091d5 ] 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>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.