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7569459a52
DSA can treat IFF_PROMISC and IFF_ALLMULTI on standalone user ports as
signifying whether packets with an unknown MAC DA will be received or
not. Since known MAC DAs are handled by FDB/MDB entries, this means that
promiscuity is analogous to including/excluding the CPU port from the
flood domain of those packets.
There are two ways to signal CPU flooding to drivers.
The first (chosen here) is to synthesize a call to
ds->ops->port_bridge_flags() for the CPU port, with a mask of
BR_FLOOD | BR_MCAST_FLOOD. This has the effect of turning on egress
flooding on the CPU port regardless of source.
The alternative would be to create a new ds->ops->port_host_flood()
which is called per user port. Some switches (sja1105) have a flood
domain that is managed per {ingress port, egress port} pair, so it would
make more sense for this kind of switch to not flood the CPU from port A
if just port B requires it. Nonetheless, the sja1105 has other quirks
that prevent it from making use of unicast filtering, and without a
concrete user making use of this feature, I chose not to implement it.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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| certs | ||
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| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
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.