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Florian Fainelli says: ==================== net: dsa: VLAN devices w/ filtering This patch series supports having VLAN devices on top of DSA/switch ports while the switch has VLAN filtering globally turned on (as is the case with Broadcom switches). Whether the switch does global or per-port VLAN filtering, having VLAN entries for these VLAN devices is beneficial. We take care of a few possibly problematic cases: - adding a VLAN device while there is an existing VLAN entry created by a VLAN aware bridge. The entire bridge's VLAN database and not just the specific bridge port is being checked to be safe and conserative - adding a bridge VLAN entry when there is an existing VLAN device created is also not possible because that would lead to the bridge being able to manipulate the VLAN device's VID/attributes under its feet - enslaving a VLAN device into a VLAN aware bridge since that duplicates functionality already offered by the VLAN aware bridge Here are the different test cases that were run to exercise this: ip addr flush dev gphy ip link add dev br0 type bridge echo 1 > /sys/class/net/br0/bridge/vlan_filtering ip link set dev gphy master br0 udhcpc -i br0 vconfig add rgmii_1 100 ifconfig rgmii_1.100 192.168.100.10 ping -c 2 192.168.100.1 vconfig add br0 42 bridge vlan add vid 42 dev gphy bridge vlan add vid 42 dev br0 self ifconfig br0.42 192.168.42.2 ping -c 2 192.168.42.1 ip link del rgmii_1.100 vconfig add rgmii_1 100 ifconfig rgmii_1.100 192.168.100.10 ping -c 2 192.168.100.1 echo 0 > /sys/class/net/br0/bridge/vlan_filtering ping -c 2 192.168.100.1 ip link del rgmii_1.100 echo 1 > /sys/class/net/br0/bridge/vlan_filtering vconfig add rgmii_1 100 brctl addif br0 rgmii_1 bridge vlan add vid 100 dev rgmii_1 vconfig rem rgmii_1.100 bridge vlan add vid 100 dev rgmii_1 vconfig add rgmii_1 100 bridge vlan del vid 100 dev rgmii_1 vconfig add rgmii_1 100 brctl addif br0 rgmii_1.100 ==================== Signed-off-by: David S. Miller <davem@davemloft.net> |
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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.