On 10/18/23 10:04, Johannes Nixdorf wrote:
Support setting the FDB limit through ip link. The arguments is:
- fdb_max_learned: A 32-bit unsigned integer specifying the maximum
number of learned FDB entries, with 0 disabling
the limit.
Also support reading back the current number of learned FDB entries in
the bridge by this count. The returned value's name is:
- fdb_n_learned: A 32-bit unsigned integer specifying the current number
of learned FDB entries.
Example:
# ip -d -j -p link show br0
[ {
...
"linkinfo": {
"info_kind": "bridge",
"info_data": {
...
"fdb_n_learned": 2,
"fdb_max_learned": 0,
...
}
},
...
} ]
# ip link set br0 type bridge fdb_max_learned 1024
# ip -d -j -p link show br0
[ {
...
"linkinfo": {
"info_kind": "bridge",
"info_data": {
...
"fdb_n_learned": 2,
"fdb_max_learned": 1024,
...
}
},
...
} ]
Signed-off-by: Johannes Nixdorf <jnixdorf-oss@xxxxxx>
---
The corresponding kernel changes are in net-next.git as commit
ddd1ad68826d ("net: bridge: Add netlink knobs for number / max learned
FDB entries").
---
Changes in v5:
- Removed the RFC status again, as the kernel changes landed.
- Link to v4: https://lore.kernel.org/r/20230919-fdb_limit-v4-1-b4d2dc4df30f@xxxxxx
Changes in v4:
- Removed _entries from the names. (from review)
- Removed the UAPI change, to be synced from linux separately by the
maintainer. (from review)
For local testing e.g. `make CCOPTS="-O2 -pipe
-I${path_to_dev_kernel_headers}"` works as a workaround.
- Downgraded to an RFC until the kernel changes land.
- Link to v3: https://lore.kernel.org/netdev/20230905-fdb_limit-v3-1-34bb124556d8@xxxxxx/
Changes in v3:
- Properly split the net-next and iproute2-next threads. (from review)
- Changed to *_n_* instead of *_cur_*. (from review)
- Use strcmp() instead of matches(). (from review)
- Made names in code and documentation consistent. (from review)
- Various documentation fixes. (from review)
- Link to v2: https://lore.kernel.org/netdev/20230619071444.14625-1-jnixdorf-oss@xxxxxx/
Changes in v2:
- Sent out the first corresponding iproute2 patches.
- Link to v1: https://lore.kernel.org/netdev/20230515085046.4457-1-jnixdorf-oss@xxxxxx/
---
ip/iplink_bridge.c | 21 +++++++++++++++++++++
man/man8/ip-link.8.in | 10 ++++++++++
2 files changed, 31 insertions(+)
Acked-by: Nikolay Aleksandrov <razor@xxxxxxxxxxxxx>
