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7a29d220f4
The error handling for the current tagging protocol change procedure is a bit brittle (we dismantle the previous tagging protocol entirely before setting up the new one). By identifying which parts of a tagging protocol are unique to itself and which parts are shared with the other, we can implement a protocol change procedure where error handling is a bit more robust, because we start setting up the new protocol first, and tear down the old one only after the setup of the specific and shared parts succeeded. The protocol change is a bit too open-coded too, in the area of migrating host flood settings and MDBs. By identifying what differs between tagging protocols (the forwarding masks for host flooding) we can implement a more straightforward migration procedure which is handled in the shared portion of the protocol change, rather than individually by each protocol. Therefore, a more structured approach calls for the introduction of a structure of function pointers per tagging protocol. This covers setup, teardown and the host forwarding mask. In the future it will also cover how to prepare for a new DSA master. The initial tagging protocol setup (at driver probe time) and the final teardown (at driver removal time) are also adapted to call into the structured methods of the specific protocol in current use. This is especially relevant for teardown, where we previously called felix_del_tag_protocol() only for the first CPU port. But by not specifying which CPU port this is for, we gain more flexibility to support multiple CPU ports in the future. Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org> |
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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.